And when I discuss my work on the economic impact of government spending, I often get the same reaction.

This is why it’s important that a growing number of establishment outfits are slowly but surely coming around to the same point of view.

• The European Central Bank published a study showing “…a significant negative effect of the size of government on growth.”
• A study by two Harvard economists found that “large adjustments in fiscal policy, if based on well-targeted spending cuts, have often led to expansions.”
• The Organization for Economic Cooperation and Development noted in recent research that welfare programs are economically destructive because they lure people into dependency because “net disposable income would increase despite putting in fewer hours.”
• A study from the International Monetary Fund concluded that “Cuts to pension and health entitlements had the most beneficial effect on economic growth.”

This is remarkable. It’s beginning to look like the entire world has figured out that there’s an inverse relationship between big government and economic performance.

That’s an exaggeration, of course. There are still holdouts pushing for more statism in Pyongyang, Paris, Havana, and parts of Washington, DC.

But maybe they’ll be convinced by new research from the World Bank, which just produced a major report on the outlook for Europe. In chapter 7, the authors explain some of the ways that big government can undermine prosperity.

There are good reasons to suspect that big government is bad for growth. Taxation is perhaps the most obvious (Bergh and Henrekson 2010). Governments have to tax the private sector in order to spend, but taxes distort the allocation of resources in the economy. Producers and consumers change their behavior to reduce their tax payments. Hence certain activities that would have taken place without taxes, do not. Workers may work fewer hours, moderate their career plans, or show less interest in acquiring new skills. Enterprises may scale down production, reduce investments, or turn down opportunities to innovate. …Over time, big governments can also create sclerotic bureaucracies that crowd out private sector employment and lead to a dependency on public transfers and public wages. The larger the group of people reliant on public wages or benefits, the stronger the political demand for public programs and the higher the excess burden of taxes. Slowing the economy, such a trend could increase the share of the population relying on government transfers, leading to a vicious cycle (Alesina and Wacziarg 1998). Large public administrations can also give rise to organized interest groups keener on exploiting their powers for their own benefit rather than facilitating a prosperous private sector (Olson 1982).

In other words, government spending undermines growth, and the damage is magnified by poorly designed tax policies.

The authors then put forth a theoretical hypothesis.

…economic models argue that the excess burden of tax increases disproportionately with the tax rate—in fact, roughly proportional to its tax rate squared (Auerbach 1985). Likewise, the scope for self-interested bureaucracies becomes larger as the government channels more resources. At the same time, the core functions of government, such as enforcing property rights, rule of law and economic openness, can be accomplished by small governments. All this suggests that as government gets bigger, it becomes more likely that the negative impact of government might dominate its positive impact. Ultimately, this issue has to be settled empirically. So what do the data say?

These are important insights, showing that class-warfare tax increases are especially destructive and that government spending undermines growth unless the public sector is limited to core functions.

Then the authors report their results.

Figure 7.9 groups annual observations in four categories according to the share of government spending in GDP during that year. Both samples show a negative relationship between government size and growth, though the reduction in growth as government becomes bigger is far more pronounced in Europe, particularly when government size exceeds 40 percent of GDP. …we provide new econometric evidence on the impact of government size on growth using a panel of advanced and emerging economies since 1995. As estimates can be biased due to problems of omitted variables, endogeneity, or measurement errors, it is necessary to rely on a broad range of estimators. …They suggest that a 10 percentage point increase in initial government spending as a share of GDP in Europe is associated with a reduction in annual real per capita GDP growth of around 0.6–0.9 percentage points a year (table A7.2). The estimates are roughly in line with those from panel regressions on advanced economies in the EU15 and OECD countries for periods from 1960 or 1970 to 1995 or 2005 (Bergh and Henrekson 2010 and 2011).

These results aren’t good news for Europe, but they also are a warning sign for the United States. The burden of government spending has jumped by about eight percentage points of GDP since Bill Clinton left office, so this could be the explanation for why growth in America is so sluggish.

Last but not least, they report that social welfare spending does the most damage.

Governments are big in Europe mainly due to high social transfers, and big governments are a drag on growth. The question is whether this is because of high social transfers? The answer seems to be that it is. The regression results for Europe, using the same approach as outlined earlier, show a consistently negative effect of social transfers on growth, even though the coefficients vary in size and significance (table A7.4). The result is confirmed through BACE regressions. High social transfers might well be the negative link from government size to growth in Europe.

The last point in this passage needs to be emphasized. It is redistribution spending that does the greatest damage. In other words, it’s almost as if Obama (and his counterparts in places such as France and Greece) are trying to do the greatest possible damage to the economy.

In reality, of course, these politicians are simply trying to buy votes. But they need to understand that this shallow behavior imposes very high costs in terms of foregone growth.

To elaborate, this video discusses the Rahn Curve, which augments the data in the World Bank study.

As I argue in the video, even though most of the research shows that economic growth is maximized when government spending is about 20 percent of GDP, I think the real answer is that prosperity is maximized when the public sector consumes less than 10 percent of GDP.

But since government in the United States is now consuming more than 40 percent of GDP (about as much as Spain!), the first priority is to figure out some way of moving back in the right direction by restraining government so it grows slower than the private sector.

Please forgive all these questions. I’m trying to figure out why any organization – even a leftist bureaucracy such as the OECD – would send out a press release entitled, “Rising tax revenues: a key to economic development in Latin American countries.”

Not even Keynesians, after all, think higher taxes are a recipe for growth.

Ah, never mind. I just remembered that the OECD is a hotbed of statism, so the press release makes perfect sense. After all, the US-taxpayer-funded organization has become infamous for reflexively advocating big government.

• The OECD has an anti-tax competition project designed to prop up Europe’s bankrupt welfare states.
• The OECD is pushing a “Multilateral Convention” that is designed to become something akin to a World Tax Organization, with the power to persecute nations with free-market tax policy.
• The OECD has endorsed Obama’s class-warfare agenda, publishing documents endorsing “higher marginal tax rates” so that the so-called rich “contribute their fair share.”
• The OECD pulled off a hat trick of bad policy in a 2010 document, promoting a value-added tax, Obama’s global warming agenda, and failed Keynesian stimulus.
• The OECD endorsed Obamacare, as I explain in this video.
• The OECD even advocates higher taxes when nations are in the middle of economic crisis.

With this dismal track record, it’s hardly a surprise that the Paris-based bureaucracy is now pushing to undermine prosperity in Latin America. Here’s some of what the OECD said in its release.

Additional tax revenues enable governments to simultaneously improve their competitiveness and promote social cohesion through increased spending on education, infrastructure and innovation. Latin American countries have made great strides over the past two decades in raising tax revenues.

You won’t be surprised when I tell you that the Paris-based bureaucrats do not bother to provide even the tiniest shred of proof to support the silly claim that higher taxes improve competitiveness. But that shouldn’t be surprising since even Keynesians don’t believe something that absurd.

And the claim about social cohesion also is a bit of a stretch given the riots, chaos, and social disarray in many European nations.

The only accurate part of the passage is that Latin American nations have increased tax burdens over the past 20 years. To the tax-free bureaucrats at the OECD, that is making “great strides.”

Let’s see what else the OECD had to say.

Despite these improvements, significant gaps between Latin America and OECD countries remain. The average tax to GDP ratio in OECD countries is much higher than in Latin American countries (33.8% compared to 19.2% in 2009, respectively). As the countries in the region still find themselves in relatively strong economic conditions, now is the time to consider reforms that generate long-term, stable resources for governments to finance development.

Wow. The OECD is implying that Latin American nations should mimic OECD nations. In other words, the bureaucrats in Paris apparently think it makes sense to tell nations to copy the failed high-tax, welfare-state model of countries such as Greece, Italy, and Spain.

Is that really the lesson they think people should learn from recent fiscal history? Are they really so oblivious and/or blinded by ideology that they issued the release as these European nations are in the middle of a fiscal crisis?

To further demonstrate their bias, the folks at the OECD even acknowledged that the Latin American nations, with their less oppressive tax regimes, are enjoying “relatively strong economic conditions.” Normal people would therefore conclude that the failed high-tax European nation should copy Latin America on fiscal policy, not the other way around. But not the geniuses at the OECD.

Now that we’ve addressed the awful policy advice of the OECD, let’s take a moment to look at the real policy challenges facing Latin America.

The Fraser Institute, in cooperation with dozens of other research organizations around the world, produces every year a comprehensive survey measuring Economic Freedom of the World.

The report ranks 141 nations based on dozens of variables that are used to construct scores for five key measures of economic freedom. Of those five categories, the Latin nations have the highest average ranking on…you guessed it…fiscal policy.

Yet the OECD wants policies that will undermine the competitiveness of the Latin nations, hurting them in the area where they are doing a halfway decent job.

If the bureaucrats actually wanted to boost economic performance in Latin America, they would be pressuring those nations to make reforms in the two areas where the burden of government is most severe – legal structure/property rights and regulation.

But that would make sense, which is contrary to the OECD’s mission of promoting statism.

The only semi-positive thing to say about the OECD is that it is consistent. As this video explains, the Paris-based bureaucrats are advocating bigger government in the United States. And to add insult to injury, they’re using American tax dollars to push that agenda.

What a scam. Politicians from various nations send taxpayer money to Paris. The bureaucrats at the OECD then issue reports and studies saying the politicians in those countries should raise taxes and increase the burden of government. Everybody wins…except for taxpayers and the global economy.

Per dollar spent, OECD subsidies may be the most destructively wasteful part of the federal budget. And that says a lot.

I’m tempted to say the value-added tax since our hopes of restraining the federal government will be greatly undermined if we give the buffoons in Washington a new source of revenue. Indeed, this is one of the reasons why Mitt Romney may be an ever greater long-term threat to American exceptionalism than Barack Obama.

But even though the VAT is fiscal poison, it’s not the most dangerous policy proposal.

At the top of my list is global taxation.

I wrote in 2010 about some of the awful global tax schemes being pushed by the United Nations. And I also noted that unrepentant statists such as George Soros are pimping for global taxation.

I even wrote a paper back in 2001 to explain why global taxes are such a bad idea.

The details of the tax don’t matter. It’s the principle.

A supra-national taxing authority inevitably would mean bigger government and more statism. As such, it doesn’t matter whether the new global tax is imposed on financial transactions, carbon emissions, tobacco, the Internet, munitions, foreign exchange, pollution permits, energy, or airline tickets.

And the statists are not giving up. Here are passages from a news report on their latest scheme.

…civil society leaders demanded a basic level of social security as they promoted a “social protection floor” at a preparatory forum for the Commission on Social Development, which began Feb. 1. The focus of the forum was “universal access to basic social protection and social services.” “No one should live below a certain income level,” stated Milos Koterec, President of the Economic and Social Council of the United Nations. “Everyone should be able to access at least basic health services, primary education, housing, water, sanitation and other essential services.” These services were presented at the forum as basic human rights equal to the rights of “life, liberty and the pursuit of happiness.” The money to fund these services may come from a new world tax. “We will need a modest but long-term way to finance this transformation,” stated Jens Wandel, Deputy Director of the United Nations Development Program. “One idea which we could consider is a minimal financial transaction tax (of .005 percent). This will create $40 billion in revenue.” “It is absolutely essential to establish controls on capital movements and financial speculation,” said Ambassador Jorge Valero, the current Chairman of the Commission on Social Development. He called for “progressive policies of taxation” that would require “those who earn more to pay more taxes.” Valero’s speech to the forum focused on capitalism as the source of the world financial problems.

This is unfettered statism, class warfare, and redistributionism, which is what you might expect from proponents of global taxation. But the part that really stands out is the assertion that government should guarantee a “certain income level” with freebies for things such as healthcare and housing.

If this sounds familiar, you probably saw the post about Franklin Roosevelt’s authoritarian proposal for a “Second Bill of Rights” that would guarantee “rights” to jobs, recreation, housing, good health, and security.

Remember, though, that whenever a leftist asserts the right to be given something, that person simultaneously and necessarily is demanding a right to take from someone else. This is why I deliberately chose to call the proposal authoritarian.

But I’m digressing. Let’s get back to the issue of global taxation.

The most important thing to understand is that leftists want global taxation. To get the ball rolling, they’ll take any tax for any purpose. They simply want to get the camel’s nose under the tent.

Once the precedent of global taxation has been established, then it’s a relatively simple matter for politicians to augment the first levy with additional taxes. Perhaps the camel analogy would be more accurate if we referred to some other part of the animal and warned that taxpayers won’t be happy when they learn where it’s going to be inserted.

The bad news is that some American politicians already have endorsed this scheme, most notably Nancy Pelosi, the former Speaker of the House.

But the good news is that global taxation is a toxic issue, which means politicians who have to get votes from non-crazy people are very reluctant to support taxing powers for the United Nations or any other entity. President Obama, for instance, already has rejected some global tax proposals and his Administration has been resisting other European proposals for global taxation.

But don’t be deluded into thinking the White House actually is good on these issues. This is the Administration, after all, that avidly supports a scheme from an American-funded Paris-based bureaucracy that would result in something akin to an international tax organization. Same bad concept, but different approach.

Those two charts showed that the current recovery was very weak compared to the boom of the early 1980s.

But perhaps that was an unfair comparison. Maybe the Reagan recovery started strong and then hit a wall. Or maybe the Obama recovery was the economic equivalent of a late bloomer.

So let’s look at the same charts, but add an extra year of data. Does it make a difference?

Meh…not so much.

Let’s start with the GDP data. The comparison is striking. Under Reagan’s policies, the economy skyrocketed.  Heck, the chart prepared by the Minneapolis Fed doesn’t even go high enough to show how well the economy performed during the 1980s.

Under Obama’s policies, by contrast, we’ve just barely gotten back to where we were when the recession began. Unlike past recessions, we haven’t enjoyed a strong bounce. And this means we haven’t recovered the output that was lost during the downturn.

This is a damning indictment of Obamanomics

Indeed, I made this point several months ago when analyzing some work by Nobel laureate Robert Lucas. And it’s been highlighted more recently by James Pethokoukis of the American Enterprise Institute and the news pages of the Wall Street Journal.

Unfortunately, the jobs chart is probably even more discouraging. As you can see, employment is still far below where it started.

This is in stark contrast to the jobs boom during the Reagan years.

So what does this mean? How do we measure the human cost of the foregone growth and jobs that haven’t been created?

Writing in today’s Wall Street Journal, former Senator Phil Gramm and budgetary expert Mike Solon compare the current recovery to the post-war average as well as to what happened under Reagan.

If in this “recovery” our economy had grown and generated jobs at the average rate achieved following the 10 previous postwar recessions, GDP per person would be $4,528 higher and 13.7 million more Americans would be working today. …President Ronald Reagan’s policies ignited a recovery so powerful that if it were being repeated today, real per capita GDP would be $5,694 higher than it is now—an extra $22,776 for a family of four. Some 16.9 million more Americans would have jobs.

By the way, the Gramm-Solon column also addresses the argument that this recovery is anemic because the downturn was caused by a financial crisis. That’s certainly a reasonable argument, but they point out that Reagan had to deal with the damage caused by high inflation, which certainly wreaked havoc with parts of the financial system. They also compare today’s weak recovery to the boom that followed the financial crisis of 1907.

But I want to make a different point. As I’ve written before, Obama is not responsible for the current downturn. Yes, he was a Senator and he was part of the bipartisan consensus for easy money, Fannie/Freddie subsidies, bailout-fueled moral hazard, and a playing field tilted in favor of debt, but his share of the blame wouldn’t even merit an asterisk.

My problem with Obama is that he hasn’t fixed any of the problems. Instead, he has kept in place all of the bad policies – and in some cases made them worse. Indeed, I challenge anyone to identify a meaningful difference between the economic policy of Obama and the economic policy of Bush.

• Bush increased government spending. Obama has been increasing government spending.
• Bush adopted Keynesian “stimulus” policies. Obama adopted Keynesian “stimulus” policies.
• Bush bailed out politically connected companies. Obama has been bailing out politically connected companies.
• Bush supported the Fed’s easy-money policy. Obama has been supporting the Fed’s easy-money policy.
• Bush created a new healthcare entitlement. Obama created a new healthcare entitlement.
• Bush imposed costly new regulations on the financial sector. Obama imposed costly new regulations on the financial sector.

I could continue, but you probably get the  point. On economic issues, the only real difference is that Bush cut taxes and Obama is in favor of higher taxes. Though even that difference is somewhat overblown since Obama’s tax policies – up to this point – haven’t had a big impact on the overall tax burden (though that could change if his plans for higher tax rates ever go into effect).

This is why I always tell people not to pay attention to party labels. Bigger government doesn’t work, regardless of whether a politician is a Republican or Democrat. The problem isn’t Obamanomics, it’s Bushobamanomics. But since that’s a bit awkward, let’s just call it statism.

When CBO issued new numbers early last year, I repeated the exercise and again found that the same modest level of budgetary restraint would eliminate red ink in about 10 years.

And when CBO issued their update last summer, I did the same thing and once again confirmed that deficits would disappear in a decade if politicians didn’t let the overall budget rise by faster than 2 percent each year.

Well, the new CBO 10-year forecast was released this morning. I’m going to give you three guesses about what I discovered when I looked at the numbers, and the first two don’t count.

Yes, you guessed it. As the chart illustrates (click to enlarge), balancing the budget doesn’t require any tax increases. Not does it require big spending cuts (though that would be a very good idea).

Even if we assume that the 2001 and 2003 tax cuts are made permanent, all that is needed is for politicians to put government on a modest diet so that overall spending grows by about 2 percent each year. In other words, make sure the budget doesn’t grow faster than inflation.

Tens of millions of households and businesses manage to meet this simple test every year. Surely it’s not asking too much to get the same minimum level of fiscal restraint from the crowd in Washington, right?

At this point, you may be asking yourself whether it’s really this simple. After all, you’ve probably heard politicians and journalists say that deficits are so big that we have no choice but to accept big tax increases and “draconian” spending cuts.

But that’s because politicians use dishonest Washington budget math. They begin each fiscal year by assuming that spending automatically will increase based on factors such as inflation, demographics, and previously legislated program changes.

This creates a “baseline” and if they enact a budget that increases spending be less than the baseline, that increase magically becomes a cut. This is what allowed some politicians to say that last year’s Ryan budget cut spending by trillions of dollars even though spending actually would have increased by an average of 2.8 percent each year.

Needless to say, proponents of big government deliberately use dishonest budget math because it tilts the playing field in favor of bigger government and higher taxes.

There are two important caveats about these calculations.

1. We should be dramatically downsizing the federal government, not just restraining its growth. Even if he’s not your preferred presidential candidate, Ron Paul’s proposal for an immediate $1 trillion reduction in the burden of federal spending is a very good idea. Merely limiting the growth of spending is a tiny and timid step in the right direction.

2. We should be focusing on the underlying problem of excessive government, not the symptom of too much red ink. By pointing out the amount of spending restraint that would balance the budget, some people will incorrectly conclude that getting rid of deficits is the goal.

Last but not least, here is the video I narrated in 2010 showing how red ink would quickly disappear if politicians curtailed their profligacy and restrained spending growth.

Other than updating the numbers, the video is just as accurate today as it was back in 2010. And the concluding message – that there is no good argument for tax increases – also is equally relevant today.

P.S. Some people will argue that it’s impossible to restrain spending because of entitlement programs, but this set of videos shows how to reform Social Security, Medicare, and Medicaid.

P.P.S. Some people will say that the CBO baseline is unrealistic because it assumes the sequester will take place. They may be right if they’re predicting politicians are too irresponsible and profligate to accept about $100 billion of annual reductions from a $4,000 billion-plus budget, but that underscores the core message that there needs to be a cap on total spending so that the crowd in Washington isn’t allowed to turn America into Greece.

Simply stated, people respond to incentives. When tax rates are punitive, folks earn and report less taxable income, and vice-versa.

• When tax rates increase, sometimes they engage in tax avoidance, lowering their tax liabilities legally.
• When tax rates change, sometimes they choose to alter their levels of work, saving, and investment.
• And when tax rates go up, sometimes they resort to illegal steps to protect themselves from the tax authority.

In a previous post, I quoted an article from the International Monetary Fund, which unambiguously concluded that high tax burdens are the main reason people don’t fully comply with tax regimes:

Macroeconomic and microeconomic modeling studies based on data for several countries suggest that the major driving forces behind the size and growth of the shadow economy are an increasing burden of tax and social security payments… The bigger the difference between the total cost of labor in the official economy and the after-tax earnings from work, the greater the incentive for employers and employees to avoid this difference and participate in the shadow economy. …Several studies have found strong evidence that the tax regime influences the shadow economy.

Indeed, it’s worth noting that international studies find that the jurisdictions with the highest rates of tax compliance are the ones with reasonable tax systems, such as Hong Kong, Switzerland, and Singapore.

Now there’s a new study confirming these findings. Authored by two economists, one from the University of Wisconsin and the other from Jacksonville University, the new research cites the impact of tax burdens as well as other key variables.

Here are some key findings from the study.

According to the results provided in Table 2, the coefficient on the average effective federal income tax variable (AET) is positive in all three estimates and statistically significant for the overall study periods (1960-2008) at beyond the five percent level and statistically significant at the one percent level for the two sub-periods (1970-2007 and 1980-2008). Thus, as expected, the higher the average effective federal income tax rate, the greater the expected benefits of tax evasion may be and hence the greater the extent of that income tax evasion. This finding is consistent with most previous studies of income tax evasion using official data… In all three estimates, [the audit variable] exhibits the expected negative sign; however, in all three estimates it fails to be statistically significant at the five percent level. Indeed, these three coefficients are statistically significant at barely the 10 percent level. Thus it appears the audit rate (AUDIT) variable, of an in itself, may not be viewed as a strong deterrent to federal personal income taxation [evasion].

Translating from economic jargon, the study concludes that higher tax burdens lead to more evasion. Statists usually claim that this can be addressed by giving the IRS more power, but the researchers found that audit rates have a very weak effect.

The obvious conclusion, as I’ve noted before, is that lower tax rates and tax reform are the best way to improve tax compliance – not more power for the IRS.

Incidentally, this new study also finds that evasion increases when the unemployment rate increases. Given his proposals for higher tax rates and his poor track record on jobs, it almost makes one think Obama is trying to set a record for tax evasion.

The study also finds that dissatisfaction with government is correlated with tax evasion. And since Obama’s White House has been wasting money on corrupt green energy programs and a failed stimulus, that also suggests that the Administration wants more tax evasion.

Indeed, this last finding is consistent with some research from the Bank of Italy that I cited in 2010.

…the coefficient of public spending inefficiency remains negative and highly significant. …We find that tax morale is higher when the taxpayer perceives and observes that the government is efficient; that is, it provides a fair output with respect to the revenues.

And I imagine that “tax morale” in the United States is further undermined by an internal revenue code that has metastasized into a 72,000-page monstrosity of corruption and sleaze.

On the other hand, tax evasion apparently is correlated with real per-capita gross domestic product. And since the economy has suffered from anemic performance over the past three years, that blows a hole in the conspiratorial theory that Obama wants more evasion.

All joking aside, I’m sure the President wants more tax compliance and more prosperity. And since I’m a nice guy, I’m going to help him out. Mr. President, this video outlines a plan that would achieve both of those goals.

Given his class-warfare rhetoric, I’m not holding my breath in anticipation that he will follow my sage advice.

This is the Laffer Curve in action, and it’s happening again in France, only this time because the government reduced the wealth tax.

Here’s part of the story at Tax-news.com.

France’s solidarity tax on wealth (l’impôt de solidarité sur la fortune – ISF), which was radically reformed by the government in June last year, has served to yield much greater fiscal revenues for the state than initially predicted. …the government agreed that the solidarity tax on wealth would in future comprise of only two tax brackets: a 0.25% tax rate imposed on individuals with net taxable wealth in excess of EUR1.3m (USD1.7m), and a 0.5% tax rate levied on individuals with net taxable assets above EUR3m. Previously, the entry threshold at which wealth tax was applied was EUR800,000, with the rates varying between 0.55% and 1.8%. To alleviate any threshold effects, a discount mechanism was also instated applicable to wealth of between EUR1.3m and EUR1.4m, as well as to wealth of between EUR3m and EUR3.2m. Although the new provisions provide for lower tax rates and for the abolition of the first tax bracket, effectively exempting around 300,000 taxpayers from the tax, according to latest government figures, the tax yielded around EUR4.3bn in 2011, almost EUR60m more than originally forecast in the collective budget.

This is not to say that France is an example to follow. There shouldn’t be any wealth tax, and income tax rates are still far too high.

And it’s also worth remembering that tax policy is just one of many factors that determine economic performance.

That being said, nations that shift from terrible tax policy to bad tax policy will enjoy better economic performance, just as nations that go from good policy to great policy also will reap benefits.

In other words, incremental changes make a difference. That’s even the case when the politicians impose a “Snooki tax” on indoor tanning services.

The most dramatic Laffer Curve effects, though, occur when there are big changes in policy. This video looks at some of the evidence.

This video is part of a three-part series, by the way. Click here if you want to see the entire set.