This is the final report on the research done for the Joint Statistical Agreement between the Census Bureau and the United Cambodian Community entitled, "Behavioral Causes of Undercounts: Cambodians in Long Beach." The purpose of this study was to document and explain a suspected undercount among Cambodian refugees. To do this we studied a sample two block area within a concentration of Cambodian refugees and compared results of our Alternative Enumeration (AE) with the 1990 census enumeration of the same two block section. Our site was located in Long Beach, California. As the home of the largest Cambodian population outside of Southeast Asia, Long Beach was the obvious choice for this study. In addition, the site met other criteria: the Cambodians were concentrated in an urban area; most of them arrived in Long Beach since the last census; the average level of formal education was low; a large percentage of the adult refugees had little fluency in English.