A measure of the protection provided to an industry by the entire structure of tariffs, taking into account the effects of tariffs on inputs as well as on outputs. Letting b_ij be the share of input i in the value of output j, and t_i be the tariff on good i, the ERP of industry j is ERP_j = (t_j-_ib_ijt_i)/(1-_ib_ij). Due to Corden (1966).