How Representative are Snowball Samples? Using the Ethnosurvey to Study Guatemala-U.S. Migration.

Area of Science:

• Sociology
• Demography
• Migration Studies

Background:

• The Mexican Migration Project (MMP) is a key resource for migration research.
• Existing MMP weighting schemes may not fully capture migrant settlement patterns.
• Binational ethnosurveys offer rich data for methodological refinement.

Purpose of the Study:

• To develop an improved weighting scheme for binational migration data.
• To assess the representativeness of the U.S. migrant sample in migration research.
• To evaluate the impact of different weighting procedures on estimates of migrant integration.

Main Methods:

• Utilized binational ethnosurvey data from Guatemala and the United States (Providence, RI).
• Developed an alternative weighting procedure distinguishing temporary and settled migrants.
• Employed demographic characteristics and integration experiences of recent U.S. trips.
• Used a composite index of migrant integration to compare weighting impacts.

Main Results:

• The U.S. migrant sample is broadly representative across various background characteristics.
• The proposed alternative weighting procedure differentiates between temporary and settled migrants.
• The standard MMP sample weighting procedure biases estimates of migrant integration downward.

Conclusions:

• Refined weighting schemes are crucial for accurate migration research.
• The standard MMP weighting may lead to underestimation of migrant integration.
• Further methodological development is needed to enhance the representativeness of migration datasets.