HeckmanStan             Fit the Heckman Selection Stan model using the
                        Normal, Student-t or Contaminated Normal
                        distributions.
MEPS2001                MEPS 2001: Ambulatory Expenditures Data
PSID1976                Panel Study of Income Dynamics 1976 Extract
geraHeckman             Generating Heckman data : Normal, Student-t,
                        Slash and Laplace
