poly_elements

<p>Degreess of polynomial interaction.</p>

<p>This function aims calculate the number of terms of a polynomial interactions.</p>

Estimation of production functions by the Olley-Pakes, Levinsohn-Petrin and Wooldridge methodologies.
The package aims to reproduce the results obtained with the Stata's user written opreg <http://www.stata-journal.com/article.html?article=st0145> and levpet <http://www.stata-journal.com/article.html?article=st0060> commands.
The first was originally proposed by Olley, G.S. and Pakes, A. (1996) <doi:10.2307/2171831>.
The second by Levinsohn, J. and Petrin, A. (2003) <doi:10.1111/1467-937X.00246>.
And the third by Wooldridge (2009) <doi:10.1016/j.econlet.2009.04.026>.

Rodrigo R Rem<c3><a9>dio

poly_elements: Number of `poly` elements.

Description

Usage

Arguments