Is di culty of purchasing health insurance as an individual or small business a major barrier to entrepreneurship in the United States? I answer this question by taking advantage of the natural experiment provided by the A ordable Care Act's dependent coverage mandate, which allowed many 19-25 year olds to acquire health insurance independently of their employment. This mandate provides a means...

We investigate the linear stability of unstably strati ed Poiseuille ow between two horizontal parallel plates under non-Boussinesq conditions. It is shown, that Squire's transformation can be used to reduce the three-dimensional stability problem to an equivalent two-dimensional one. The eigenvalue problem, consisting of the generalized Orr-Sommerfeld equations, is solved numerically using an ...

A method based on w ave-equation nitedi erence algorithm with irregular free surface is introduced to remove the scattering e ects of rugged topography. The anomalies and multiples caused by the irregular surface and shallow layers of inhomogenous media are removed before further processing steps. Simple conformal elements of nite di erence are adopted to model the irregular surface. Randomness...

This paper develops a factor proportions driven monopolistic competition model of trade to examine how home-market e¤ects (HME) vary across countries and industries. I extend the multi-sector framework of Hanson and Xiang (AER 2004) to a two factor case where …xed cost of starting a business is more capital intensive than the marginal cost. Countries with di¤erent factor endowments have di¤eren...

We present a fourth order compact nite diierence scheme on the face centered cubic (FCC) grids for the numerical solution of the two dimensional convection diiusion equation. The seven point formula is deened on a regular hexagon, where the strategy of directional derivative is employed to make the derivation procedure straightforward, eecient, and concise. A corresponding multigrid method is d...

In this paper we continue our considerations in on two scale di erence equations mainly with respect to continuous solutions Moreover we study re nable step functions and piecewise polynomials Also solutions with noncompact support are considered New algorithms for the approximative computation of continuous solutions are derived

A procedure which allows to test the hypothesis that the spectral peak frequencies of two stochastic processes are equal is proposed. The method is based on drawing new realizations of the periodograms from the two estimated spectra in order to reestimate the spectra and to obtain the distribution of the peak frequency diierence. We investigate the size and the power of the test in simulation s...

This paper focuses on policy evaluation using the well-known Least Squares Temporal Di erences (LSTD) algorithm. We give several alternative ways of looking at the algorithm: the operator-theory approach via the Galerkin method, the statistical approach via instrumental variables as well as the limit of the TD iteration. Further, we give a geometric view of the algorithm as an oblique projectio...

Most of the previous machine learning study is focused on algorithm-based learning. Another approach, reasoning-based learning, bring up many new research problems. Such a system, NARS, is brie y introduced. Finally, the di erence between di erent types of learning is discussed.

Finding di erences between two processes can be a complex, time consuming, and expensive task. Our work is based on the di erence graph approach which calculates the di erences between two process models and if available their instances. In this paper we evaluate di erent possibilities for visualizing these di erences. For this purpose we have selected some common visual properties such as colo...