To make predictions at the district level or the
level of the electoral system, the basic model requires that you first estimate
parameters by evaluating the most recent election for which you have data. To
do this, use the commands defined in the Evaluation paragraph, above. You then
must estimate the regression on these data (with a REG; command, or by
running any of the analysis procedures to evaluate that election). Then clear
all data from memory while indicating that you want predictions (using the
YVOTE command), and define the same explanatory variables for the election you
are predicting (with XNEW). (Do not use XVARS.) The coefficients from the
evaluation run on the previous election will be combined by JudgeIt with the
explanatory variables in XNEW to create your predictions. Thus, YVOTE clears
all data from memory but not the estimated regression coefficients.
