Experimental Design Details
Our study uses a robust experimental design to comprehensively investigate native perceptions and preferences regarding immigration in Spain. Participants provide essential demographic information to ensure the representativeness of the sample, including income, relationships with foreign-born relatives, educational attainment, employment status, media consumption, and political preferences. Following the initial personal information, 2/3 of the total sample will be randomly assigned to receive an information intervention (Treatment 1 or Treatment 2). The goal is to assess the causal relationship between perceptions of immigration and support for immigration policies. This experimental approach aims to determine how factual information influences the attitudes and preferences of native-born respondents and to unravel the complex mechanisms behind immigration perceptions and policy support. We assess misperceptions about the size, demographic composition, and socioeconomic characteristics of the immigrant population, including labor market outcomes, educational attainment, and reliance on social welfare programs. The research extends to the native population's perceptions of the impact of immigration on labor markets, the welfare state, and cultural security. The study presents possible reasons for the differential performance of immigrants and natives in the labor market. We assess the importance respondents attach to factors unrelated to immigrants (e.g., discrimination, institutional barriers) and factors related to their characteristics (e.g., lack of effort, cultural differences, required skills). In addition, we examine the preferences of natives for migration policies, distinguishing between entry policies and labor integration policies. The analysis includes support or opposition to both predistributive and redistributive policies, providing a nuanced understanding of the native population's stance on various aspects of immigration and labor market interventions.