Unemployment in California is still rising. It just went up from 12.3 to 12.5%, nearly three points above an already bad national average. This horrendous figure is the source of California's budget problem. The huge loss of tax revenue is compounded by greatly increased unemployment outlays. If we look at the few other states that have unemployment figures well above the national average, there are obvious explanations. Michigan is at 14.6 because employment in its major industry (automobiles) has collapsed. Nevada, at 13.0, is dependent on discretionary cash at a time when there isn't any. But California is too big to be dominated by one industry, and its plight can only be explained by the state's having grossly mismanaged its affairs.
In 2007 Raymond Keating formulated a Small Business Survival Index, which is a composite of various aspects of the climate for business in a particular state: business and personal taxes, regulations, mandates, and so on. In that index California ranked 49 among the 50 states. Rhode Island ranked just above California, and its unemployment rate is 12.7. At the bottom of the Index is D.C., and its unemployment rate is 12.1.
In the component parts of the SBSI index, California ranks worst of 51 (including D.C.) on top personal tax rates, worst on top capital gains tax rates, 42 on corporate taxes, 43 on health insurance mandates, 46 on electric utility costs, 47 on workman's compensation costs, rock bottom again on state gas taxes, 45 on state and local government five year spending trends, and 47 on state and local per capita government spending. It also ranks 49 among the states on the US Economic freedom index, and it has the highest state sales tax rate too: where some states have an income tax but no sales tax, and others have a sales tax but no income tax, California has both, AND it has the highest rates in both.