Correction: J Knowl Econ (2020)

https://doi.org/10.1007/s13132-020-00639-z

The original version of this article unfortunately contained a mistake. Equation was incorrectly captured

Thus, this erratum is presented to fix this error.

$${D}_{it}={\mu}_i+{\beta}^{\prime }{X}_{it}+{\theta}_1{G}_{it}I\left({d}_{it}\le \gamma \right)+{\theta}_2{G}_{it}I\left({d}_{it}>\gamma \right)+{\varepsilon}_{it}$$

The original article has been corrected.