¿Cuánto es el premio al salario por pertenecer a un sindicato en el Ecuador?: Un análisis usando Propensity Score Matching

In this paper it is wanted to respond the question how much is the prize in the wages of people that belong to an union or workers association in the Ecuador, so much in the public sector as private, with regard to those that don't belong, and observe if this differential is attributed to personal differences and of the work type, for the Ecuadorian case. For that we use a focus of matching statistical semi-parametric, well-known as propensity score matching to compare the results of the workers that belong to an union “matched” with the workers that don't belong to the same one to deduce the causal effect on the wages of the members union, finding prizes of 37% until 99% but, approximately. For this obtained secondary data of the survey of conditions of life carried out in the year 1998, belonging to the project LSMS that implement the World Bank.