lalonde               package:MatchIt               R Documentation

_D_a_t_a _f_r_o_m _N_a_t_i_o_n_a_l _S_u_p_p_o_r_t_e_d _W_o_r_k _D_e_m_o_n_s_t_r_a_t_i_o_n _a_n_d _P_S_I_D, _a_s _a_n_a_l_y_z_e_d _b_y _D_e_h_e_j_i_a _a_n_d _W_a_h_b_a (_1_9_9_9).

_D_e_s_c_r_i_p_t_i_o_n:

     This is a subsample of the data from the treated group in the
     National Supported Work Demonstration (NSW) and the comparison
     sample from the Current Population Survey (CPS).   This data was
     previously analyzed extensively by Lalonde (1986) and Dehejia and
     Wahba (1999).   The full dataset is available at <URL:
     http://www.columbia.edu/~rd247/nswdata.html>.

_U_s_a_g_e:

     data(lalonde)

_F_o_r_m_a_t:

     A data frame with 313 observations (185 treated, 429 control). 
     There are 10 variables measured for each individual.  "treat" is
     the treatment assignment (1=treated, 0=control).   "age" is age in
     years.  "educ" is education in number of years of schooling. 
     "black" is an indicator for African-American (1=African-American,
     0=not).  "hispan" is an indicator for being of Hispanic origin
     (1=Hispanic, 0=not).  "married" is an indicator for married
     (1=married, 0=not married).  "nodegree" is an indicator for
     whether the individual has a high school degree (1=no degree,
     0=degree). "re74" is income in 1974, in U.S. dollars.  "re75" is
     income in 1975, in U.S. dollars.  "re78" is income in 1978, in
     U.S. dollars.

_S_o_u_r_c_e:

     <URL: http://www.columbia.edu/~rd247/nswdata.html>

_R_e_f_e_r_e_n_c_e_s:

     Lalonde, R. (1986). Evaluating the econometric evaluations of
     training programs  with experimental data. {\it American Economic
     Review} 76: 604-620. \

     Dehejia, R.H. and Wahba, S. (1999).  Causal Effects in
     Nonexperimental Studies:  Re-Evaluating the Evaluation  of
     Training Programs.  {\it Journal of the American  Statistical
     Association} 94: 1053-1062.

