Table 2

Robustness Checks on OLS Estimations

Baseline Estimation
(1)
Without Sample Weights
(2)
Without Winsorization
(3)
Including Fixed Effects for Origin Continent
(4)
Using Median Regression Format
(5)
Using Boot-Strapped Standard Errors
(6)
Including Expected Overage Control
(7)
Panel A: Baseline Estimation without Controls
Inverse of log ethnic group size (small groups have larger values)0.582***0.612***0.571***0.481***0.322***0.612***0.384***
(0.076)(0.082)(0.077)(0.070)(0.063)(0.086)(0.089)
Isolation of ethnic group0.325***0.331***0.329***0.279***0.220***0.331***0.334***
(0.076)(0.081)(0.077)(0.074)(0.073)(0.088)(0.074)
Adjusted R-squared value0.3730.3680.3640.5070.1980.3680.435
Panel B: Including Controls for Ethnic Group’s Traits
Inverse of log ethnic group size (small groups have larger values)0.465***0.488***0.460***0.453***0.353***0.488***0.286***
(0.079)(0.085)(0.079)(0.079)(0.080)(0.092)(0.091)
Isolation of ethnic group0.447***0.441***0.450***0.367***0.390***0.441***0.486***
(0.094)(0.100)(0.095)(0.107)(0.088)(0.107)(0.084)
Adjusted R-squared value0.4550.4520.4540.5290.2620.4520.517
  • Notes: See Table 1. Columns 2–6 provide robustness checks on the baseline specification. Regressions in Columns 5 and 6 are unweighted and should be referenced against Column 2. Column 5 reports pseudo R-squared values. Column 7 adds a control for the expected overage level for an ethnicity based on 100 Monte Carlo simulations with the number of observations in the sample.