Сравнение на методи

	Transnationalism Survey Measurement	Migrant Network Analysis
Област	Migration Studies	Migration Studies
Семейство	Process / pipeline	Process / pipeline
Година на възникване	2003	1990
Създател	Alejandro Portes; Luis Eduardo Guarnizo & Patricia Landolt	Douglas S. Massey
Тип	Survey-measurement pipeline for cross-border activity	Network and feedback pipeline for migration self-perpetuation
Основополагащ източник	Portes, A. (2003). Conclusion: Theoretical Convergencies and Empirical Evidence in the Study of Immigrant Transnationalism. International Migration Review, 37(3), 874-892.	Massey, D. S. (1990). Social Structure, Household Strategies, and the Cumulative Causation of Migration. Population Index, 56(1), 3-26.
Други названия	Transnational Activities Survey, CIEP-Style Transnationalism Measurement, Cross-Border Activity Measurement, Immigrant Transnationalism Typology	Migration Network Analysis, Social Capital Migration Analysis, Cumulative Causation Analysis, Network Prevalence Migration Model
Свързани	3	3
Резюме	Transnationalism survey measurement is the set of techniques for turning the slippery idea of immigrant transnationalism — living life across borders — into countable survey data. Alejandro Portes and his collaborators, working through the Comparative Immigrant Entrepreneurship Project (CIEP) and related studies, argued that transnationalism should be reserved for activities that require regular, sustained cross-border involvement, not the occasional phone call or holiday visit that virtually every immigrant makes. Their 1999 programmatic statement with Guarnizo and Landolt laid out the pitfalls of a concept stretched to cover everything, and Portes's 2003 synthesis distilled the empirical lessons into a measurement strategy. The method asks respondents about specific economic, political, and sociocultural cross-border activities, records how often each is performed, and uses an intensity threshold to separate genuinely transnational individuals from the merely connected. From these items the analyst builds a typology by domain and intensity and then estimates how common transnationalism is and who practices it. The result disciplines a fashionable but vague concept into a measurable, comparable construct.	Migrant network analysis studies the interpersonal ties — of kinship, friendship, and shared origin — that link prospective migrants to people who have already migrated, and treats these ties as a form of social capital that lowers the costs and risks of moving. Douglas Massey's 1990 article argued that once a few pioneers establish themselves at a destination, they reduce the difficulty of migration for everyone connected to them: relatives and friends can draw on their information, housing, job leads, and support, so each successful move makes the next one easier and more likely. This dynamic produces cumulative causation, a self-feeding process in which migration alters the social and economic context of the origin community in ways that promote still more migration, until flows acquire a momentum largely independent of the conditions that first set them off. Massey and colleagues' 1993 review codified network theory as one of the perpetuating mechanisms of international migration, distinct from the factors that initiate it. The analysis maps the network of ties, measures the prevalence of migration experience in a community, and models how that prevalence raises individual migration probabilities. It explains why migration streams, once begun, are so difficult to stop.