[en] The assumptions in which traditional economic theory is based suffer from anthropological realism and settle in a simplification of human behavior. The social capital is an umbrella concept that addresses the problem of embeddedness or overlap between social and economic realms, that is, the study of the contribution of the "social dimension" (norms, values, social networks, trust) to the economic fact. In this paper we develop a critical review of the theory of social capital, the diverse general trust theories, the concept of relational goods and subjective well-being. Our goal is to build a general explanatory model that contrasts and extends Lin's Model. This general model tries to give an explanation for the instrumental and expressive effects of social capital. Social capital generates both individual and collective effects, and it is also a determinant of revealed subjective well-being. The proposed model will help us to examine the bidirectional link established between micro (social network) and macro (social trust) social capital. This is a crucial theoretical hole that presents literature on this subject. Similarly we consider the concept of relational goods and analyze their influence on happiness and life satisfaction. Our empirical study is based on the Survey on Social Capital and Inequality in Spain (OSIM, 2011) for verifying our theoretical hipothesis. The results are consistent with the principles of social capital and subjective well-being theory, but correct some points on Lin's Model and remark the importance of strong ties both in the generation of general trust and revealed subjective well-being. We also propose an alternative explanation of the so-called Easterlin Paradox based on the trade off relation between relational goods and instrumental relationships.

[gl] Os supostos nos que se basea a teoría económica tradicional adoecen de realismo antropolóxico e aséntanse nunha simplificación do comportamento humano. O capital social é un concepto aglutinador que afronta o problema do embeddedness ou da imbricación entre o social e o económico, isto é, o estudo da achega da "dimensión social" (normas, valores, redes sociais, confianza) ao feito económico. No presente traballo desenvolvemos unha revisión crítica da teoría do capital social, das diversas teorías da confianza xeral, do concepto de ben relacional e da área do benestar subxectivo. O noso obxectivo será a construción dun modelo explicativo xeral que contrasta e amplía o Modelo de Lin. Este modelo xeral busca dar explicación aos efectos instrumentais e expresivos do capital social. O capital social xera rendementos tanto individuais coma colectivos, e á súa vez é determinante do benestar subxectivo revelado. O modelo formulado serviranos para estudar o vínculo bidireccional que se establece entre as dimensións micro (rede social) e macro (confianza social) do capital social. Este punto é un burato teórico crucial que presenta a literatura sobre o tema. De igual xeito abordaremos o concepto de ben relacional e analizaremos a súa influencia na felicidade e a satisfacción vital. O noso estudo empírico empregará como base a Enquisa sobre Capital Social e Desigualdade en España (OSIM, 2011) para verificar as hipóteses formuladas ao longo do traballo. Os resultados son acordes aos postulados da teoría sobre o capital social e o benestar subxectivo, pero corrixen algúns aspectos relativos ao Modelo de Lin e á importancia dos lazos fortes tanto na xeración da confianza xeral coma no benestar subxectivo revelado. Así mesmo, propoñen unha explicación alternativa da denominada Paradoxa de Easterlin baseada no trade off ou conflito entre os bens relacionais e as relacións instrumentais.