This paper develops a framework where an individual has to make a binary decision, but finds it difficult to assess the true state of the world. In the model, states can be described completely by finite sequences of zeros and ones. By observing partial information, the decision maker can reveal the true state of certain bits, which he uses to update his prior beliefs about the true state of the world. I describe the data such a model would generate and show that which data can be characterized by the model. In particular, the datasets need to abide by an axiom that eliminates choice reversals. Later I introduce the idea of distance to rationalizability; this measure describes how far a given dataset is from being rationalizable using our model. Finally, the computational process to generate such distance and to recover preferences is shown using a dataset from Mexican labor courts.

What is the effect of access to transportation networks on economic performance? This work addresses this relation by studying how access, measured as the shortest distance to the historical transportation network, has affected long run economic performance across Mexican municipalities. The effects of public infrastructure have been studied mainly using a production function approach.This study directs attention to the effect of having access to transportation infrastructure in a different sense. Using a simple model of trade and factor mobility as the theoretical framework, the relation between access and economic performance is explained by how proximity to transportation networks affects differently trade costs of connected and not connected regions, ultimately affecting gains from trade. The hypothesis is that distance to the network is negatively related with economic performance. In order to test this hypothesis, an access measure was constructed. This measure consists on the closest distance from each Mexican municipality to the network. There is a clear endogenous bias treat caused by reverse causality between economic performance and the placement of transportation infrastructure.In order to avoid this problem and following Banerjee et al. (2012), the access measure is constructed taking as reference the Mexican historical transportation network. The results show that both elasticity of total gross production per capita to distance to the network and elasticity of the

number of economic units to distance to the network are negative and significant. That is, municipalities that are closer to the transportation network display a better economic performance than those located in further places.

En el presente trabajo se explora el impacto que tiene la presencia de un individuo discapacitado dentro del hogar sobre la asistencia escolar de los individuos de éste. Para ello, se desarrolló un modelo microeconómico novedoso que sugiere un posible mecanismo de transmisión entre las variables, para luego, con información de la Encuesta Nacional de Ingreso y Gasto de los Hogares (ENIGH) 2012, estimar formalmente la relación. Los resultados muestran que existe evidencia significativa de que la presencia de un individuo discapacitado en el hogar reduce la probabilidad de asistencia escolar de los miembros de éste, en edad universitaria (19 a 24

años). En concreto, estos individuos sufren una reducción del 14.7 %, significativa al 99%de confianza, en la probabilidad de asistir a la escuela, asociada exclusivamente a la presencia de un individuo discapacitado en el hogar. Este resultado fue robusto ante variaciones significativas en la especificación del modelo econométrico, estimaciones bajo diferentes definiciones de los grupos etarios y ante pruebas cuantitativas y cualitativas de exogeneidad y validez de la estrategia de identificación.