Estimation of production functions by the Olley-Pakes, Levinsohn-Petrin and Wooldridge methodologies.

Basic syntax is formed by a multipart formula which must be specified in the following order (additional controls are optional):

olley_pakes(data = estprod_data, y ~ free | capital | proxy | controls, exit = ~exit, id = "id", time = "year", bootstrap = TRUE, reps =2)
	
levinsohn_petrin(data = estprod_data, y ~ free | capital | proxy | controls, exit = ~exit, id = "id", time = "year", bootstrap = TRUE, reps = 2, gross = FALSE)

wooldridge(data = estprod_data, y ~ free | capital | proxy | controls,  id = "id", time = "year", bootstrap = TRUE)

• id and time are panel dimensions parameters.

• exit is an optional formula indicator of the last firm's period.

• bootstrap is logical indicating if bootstraped standard errors should be calculated.

• reps is number of bootstrap replications.

• gross is a logical which indicates if dependent variable is gross output. Only in levinsohn_petrin.

• The latest released version from CRAN with

   install.packages("estprod")

• The current version from github with

  devtools::install_github("rrremedio/estprod")

Rodrigo R Remédio

This project is licensed under the GPL-3.