This paper proposes that the decline in federal disability insurance (DI) screening stringency raises the incentive of being uninsured. To support it, we provide a theoretical model and empirical evidence. JEL classification: I13, I18, H31, H51, H55

Theories of political redistribution are tested using data collected in three phases of the International Social Survey Programme. Individuals categorized as having high, middle, or low incomes were asked whether they consider the overall tax burden in their countries too high, too low or about right. Very few citizens indicated that they were satisfied with tax systems; most believed that taxe...

Innovation by users is now understood to be an important part of innovative activity in the economy. In this paper we explore the implications of adding innovation by users to existing models of social welfare that currently assume innovation by manufacturers only. We find this addition removes several inefficiencies, and that social welfare is likely to be increased by the presence of user inn...

The Formation of Migrant Networks This paper provides the first direct evidence on the determinants of link formation among immigrants in the host society. We use a purposely-designed survey on a representative sample of Sri Lankan immigrants living in Milan to study how migrants form social links among them and the extent to which this network provides them with material support along three di...

Social Insurance Networks Based on administrative panel data from Norway, we examine how social insurance dependency spreads within neighborhoods, families, ethnic minorities, and among former schoolmates. We use a fixed effects methodology that accounts for endogenous group formation, contextual interactions, and time-constant as well as time-varying confounders. We report evidence that social...

We study a symmetric independent private values auction model where the revenue-maximizing seller faces a cost cn of attracting n bidders to the auction. If the distribution of valuations possesses an increasing failure rate (IFR), the seller overinvests in attracting bidders compared to the social optimum. Conversely, if the distribution is DFR, the seller underinvests compared to the social o...

This paper explores the relationship of social capital to self-rated health status in Japan, and how this is affected by the labor market. Data of 3075 adult participants in the 2000 Social Policy and Social Consciousness (SPSC) survey were used. Controlling for endogenous bias, the main finding is that social capital has a significant positive influence on health status for people without a jo...

Let f be an ordinary polynomial in C[z1, . . . , zn] with no negative exponents and with no factor of the form z1 1 . . . z αn n where αi are non zero natural integers. If we assume in addition that f is a maximally sparse polynomial (that its support is equal to the set of vertices of its Newton polytope), then a complement component of the amoeba Af in R of the algebraic hypersurface Vf ⊂ (C∗...

Social sanctions may be a strong deterrent of crime. This paper presents a formal model that relates crime and social sanction to social interaction density. We empirically test the theoretical predictions using a provincial level panel dataset on different crimes in Italy between 1996 and 2003. We exploit detailed demographic and geo-morphological information to develop exogenous measures of s...

background: aging is a sensitive period of life and attention to the issues and needs is essential. to access to health care for the elderly and the prevention of chronic diseases, and reduce the incidence of infection, the first step is identifying the factors affecting the health of every community. one of the factors affecting it, is the social and religious support. thus, this study compare...