<title>Abstract</title> This paper studies the “Protection for Sale” model in the setting of monopolistic competition drawing on the quadratic sub-utility model. This model generates two new findings: (1) the average cross-price elasticity, in particular, only among foreign varieties in a sector negatively...

While the Helpman-Trajtenberg model is successful in explaining the macroeconomic cycle generated by GPT in the context of a closed economy, open-economy implications regarding GPT have received scant attention. We seek to fill such void in the previous literature by developing a dynamic...