The report titled "A State Transformed: Immigration and the New California" is a fascinating albeit terrifying read. Lots of charts and documentation. Take a look for yourself.
The emailed notice contained this "discussion" closing:
California is home to the high-tech and entertainment industries, has one of the nation’s largest tourism industries, and has the most productive agricultural land in the country. Historically, it was not a state with a disproportionately large unskilled population, unlike Appalachia, parts of the American South, or the Rio Grande valley. Relative to other states, it had one of the more educated labor forces in terms of the share of workers who had completed high school. But today it is the state with the largest share of its labor force that has not completed high school.
Analysis of Census Bureau data through 2008 by the Center for Immigration Studies shows this relative change is a direct result of immigration. California has become a state with one of the most skewed income distributions and it is among the states with high rates of welfare use and lack of health insurance. Immigrants in the state are six times more likely than natives not to have completed high school. While some employers argue that a continuing stream of unskilled immigrant workers is desirable, such a policy has consequences. Productivity, standard of living, welfare use, health insurance coverage, and the tax base are heavily impacted by education levels. The low level of educational attainment in the state is likely to create significant challenges for California in the foreseeable future.