This report aims to improve the quality of the policy-making process by using a broad distribution of research findings on the consequences of immigration to California. All major immigrant groups to California are included. Using the information collected, this report discusses economic and fiscal issues associated with immigration, character and tempo of assimilation processes, and impact on California of proposals for immigrant reform. The report begins with a review of current knowledge about population dynamics in populations subject to immigration and/or emigration. Then, in the context of fertility below replacement and consistent annual immigration, two questions are explored: (1) starting from any arbitrary point, what temporal path does a population follow on its way to a long-run equilibrium stationary population; and (2) how long does it take for that stationary situation to materialize? Finally some of the policy implications surrounding the twin features of non-replacement fertility and immigration are considered, along with a possible solution to the demographic dilemma confronting industrial democracies today. Barriers to more rapid immigrant adjustment must be removed and additional facilitators to immigrant adaptation must be found to speed the process of incorporating immigrants and their children into the mainstream of society. (PS)