The effect of local ties, wages, and housing costs on migration decisions

Previous research on migration has focused more on the effect of wage differences between the destination and the origin on migration and less on how non-pecuniary attachments workers have to their current location may affect their migration decisions. In this paper, we examine how the presence of a strong social network and desirable location amenities in the current location may deter individual migration across U.S. metropolitan areas. Our empirical results show that, controlling for wage and housing cost differences between metropolitan areas, workers with strong attachments to their current location are significantly less likely to move. Interestingly, the effects of a strong social network and desirable location amenities on individual migration decisions are more important than the effect of wage or housing cost differentials between the destination and the origin.migration; worker mobility; mobility costs; location amenities; wages; housing costs

A reconciliation of two alternative approaches towards buffer stock saving.

This paper shows that the two main models in the buffer stock saving literature can be nested in a model that varies the level of available social insurance. Equivalently, the assumption about the time series process for labor income (and social insurance during unemployment) is crucial in determining the level (but not the shape) of optimal consumption as a function of liquid wealth.

Race and self-employment: The role of training programs, self-employment background, and access to financing

This paper uses data from Project GATE to examine the efficacy of offering free self-employment assistance to unemployed individuals interested in self-employment, overall and by race. We also examine the effect of participants’ self-employment background, finances, and personal circumstances on their self-employment outcomes. We find that Project GATE led to significant gains in the outcomes of unemployed participants, particularly for black participants. Our analyses also show that significant portions of the race disparities in self-employment outcomes among unemployed participants are attributed to race differences in access to financing. The policy implications of our findings are discussed.self-employment; small business; unemployment; workforce development; SEA; Project GATE

Solvent Induced Proton Hopping at a Water-Oxide Interface

Despite widespread interest, a detailed understanding of the dynamics of proton transfer at interfaces is lacking. Here we use ab initio molecular dynamics to unravel the connection between interfacial water structure and proton transfer for the widely studied and experimentally well-characterized water-ZnO$(10\bar{1}0)$ interface. We find that upon going from a single layer of adsorbed water to a liquid multilayer changes in the structure are accompanied by a dramatic increase in the proton transfer rate at the surface. We show how hydrogen bonding and rather specific hydrogen bond fluctuations at the interface are responsible for the change in the structure and proton transfer dynamics. The implications of this for the chemical reactivity and for the modelling of complex wet oxide interfaces in general are also discussed.Comment: 6 pages, 5 figure

Lessons taught and learned from the operation of the solar energy e-learning laboratory

The solar energy e learning laboratory (solar e-lab) in Cyprus is a good example of a web-based, remote engineering laboratory. It comprises a pilot solar energy conversion plant which is equipped with all necessary instrumentation, data acquisition, and communication devices needed for remote access, control, data collection and processing. The impact that the solar e-lab had during its nearly 5 years of operation is indeed high. Throughout this period, the solar e-lab has been accessed by users from over 500 locations from 79 countries spread all over the world. In the period of November 2004 to October 2008, more than a million visits were recorded, out of which 25000 have registered on the site and surfed through studying the supplied material. Around 1000 hits concerned registered users that passed the pre-lab test and performed the experimentation part. The four years of operation of the solar e-lab demonstrated how the Internet can be used as a tool to make the laboratory facilities accessible to engineering students and technicians located outside the laboratory, including overseas. In this way, the solar energy e-learning lab, its equipment and experimental facilities were made available and shared by a number of interested people, thus widening educational experiences. Judging from the online evaluation reports that were received from the solar e-lab users during the last 2 years of operation, it can be concluded that there is nearly excellent satisfaction by the users

Are self-employment training programs effective? Evidence from Project GATE

In 2002, the U.S. Department of Labor and the Small Business Administration implemented Project GATE, an experimental demonstration program designed to provide free self-employment assistance to individuals interested in starting their own business. This paper uses data from Project GATE to examine the efficacy of public self-employment training programs in the modern U.S. economy. Our analyses show that GATE led to significant improvements in the post-training outcomes of treatment group participants who were unemployed at the time of application. Particularly, GATE had a significant positive impact on new business starts and sustainability for unemployed participants five years after random assignment. For those who were unemployed at random assignment, GATE also led to higher employment likelihood and higher total earnings five years after random assignment. GATE had no impact, however, for participants who were employed, self-employed, or out of the labor force at the time of application.self-employment; small business; unemployment; workforce development; SEA; Project GATE

Ab initio simulations of hydrogen-bonded ferroelectrics: collective tunneling and the origin of geometrical isotope effects

Ab initio simulations that account for nuclear quantum effects have been used to examine the order-disorder transition in squaric acid, a prototypical H-bonded antiferroelectric crystal. Our simulations reproduce the >100 K difference in transition temperature observed upon deuteration as well as the strong geometrical isotope effect observed on intermolecular separations within the crystal. We find that collective transfer of protons along the H-bonding chains - facilitated by quantum mechanical tunneling - is critical to the order-disorder transition and the geometrical isotope effect. This sheds light on the origin of isotope effects and the importance of tunneling in squaric acid which likely extends to other H-bonded ferroelectrics.Comment: 5 pages, 4 figure