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/*
Replication of
Stokes, Houston H. (2004) "On the advantage of using two or more
econometric software systems to solve the same problem",
Journal of Economic and Social Measurement, 29, pp. 307-320.
Illustrates the perfect prediction problem in binary response models.
*/
open murder_rates
series D1 = executions > 0
# linear probability model
ols D1 const time income lfp noncauc southern
# probit model
probit D1 const time income lfp noncauc southern
# reduced probit model
probit D1 const time income lfp noncauc
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