Dear All<br><br>I found that gretl provides a nice &quot;slope&quot; feature in Probit and Logit model. <br><br>However, when independent variables are discrete, gretl computes slopes as they are continuous variables. I compare gretl&#39;s result with other packages, such as STATA and Matlab (the Probit PDFoutput comparison are attached)<br>
<br>They will automatically detect the discrete variables in Probit (as well as in Logit) to compute the slope (also named as marginal effects) and mark them in a footnote:<br><br>&quot;(*) dy/dx is for discrete change of dummy variable from 0 to 1.&quot;<br>
<br>Do you think our gretl should the same thing?<br><br>Thanks<br><br>Yi-Nung<br>