Klein, Roger; Vella, Francis - Institute for the Study of Labor (IZA) - 2006
This paper formulates a likelihood-based estimator for a double index, semiparametric binary response equation. A novel … heteroscedasticity that depends on an index different from that underlying the “mean-response”. We show that such (multiplicative …) heteroscedasticity, whose form is not parametrically specified, effectively induces exclusion restrictions on the outcomes equation. The …