Helping Change of Career Individuals to Prepare to Become Secondary Mathematics Teachers

This article describes the development and content of a special introductory course developed and offered at New York University for change of career individuals entering the field of mathematics and science teaching at the graduate rather than the undergraduate level. With a critical shortage of qualified mathematics and science teachers at the secondary level being exacerbated in urban public schools, such as those in New York City, by high attrition rates during the first few years of teaching, it is important to find and encourage new populations of potential teachers. One such population is that of career changers, and the course described in this article is an attempt to help such individuals make their career change more smoothly and successfully. The focus of this course, and the illustrations provided in this article, are on the three major themes: What Does It Mean To Be An Effective Mathematics Teacher ; Technology and the Internet ; and, A Model of Effective Mathematics Teaching

COMGEN-BEM: Boundary element model generation for composite materials micromechanical analysis

Composite Model Generation-Boundary Element Method (COMGEN-BEM) is a program developed in PATRAN command language (PCL) which generates boundary element models of continuous fiber composites at the micromechanical (constituent) scale. Based on the entry of a few simple parameters such as fiber volume fraction and fiber diameter, the model geometry and boundary element model are generated. In addition, various mesh densities, material properties, fiber orientation angles, loads, and boundary conditions can be specified. The generated model can then be translated to a format consistent with a boundary element analysis code such as BEST-CMS

A Structural Approach to Identifying the Sources of Local-Currency Price Stability

The inertia of the local-currency prices of traded goods in the face of exchange-rate changes is a well-documented phenomenon in International Economics. This paper develops a structural model to identify the sources of this local-currency price stability and applies it to micro data from the beer market. The empirical procedure exploits manufacturers’ and retailers’ first-order conditions in conjunction with detailed information on the frequency of price adjustments following exchange-rate changes to quantify the relative importance of local non-traded cost components, markup adjustment by manufacturers and retailers, and nominal price rigidities in the incomplete transmission of such changes to prices. We find that, on average, approximately 60% of the incomplete exchange rate pass-through is due to local non-traded costs; 8% to markup adjustment; 30% to the existence of own-brand price adjustment costs, and 1% to the indirect/strategic effect of such costs, though these results vary considerably across individual brands according to their market shares.

Trade, Inequality, and Poverty: What Do We Know? Evidence from Recent Trade Liberalization Episodes in Developing Countries

We review the empirical evidence on the relationship between Trade Liberalization, Inequality, and Poverty based on the analysis of micro data from several developing countries that underwent significant trade reforms in recent years. Despite many measurement and identification difficulties, and despite conflicting evidence on some issues, empirical work based on country case studies' has established certain patterns that seem common across countries and trade liberalization episodes, and may hence be informative as to how developing countries adjust to trade reform.

The Response of the Informal Sector to Trade Liberalization

This paper studies the relationship between trade liberalization and informality. It is often claimed that increased foreign competition in developing countries leads to an expansion of the informal sector, defined as the sector that does not comply with labor market legislation. Using data from two countries that experienced large trade barrier reductions in the 1980's and 1990's, Brazil and Colombia, we examine the response of the informal sector to liberalization. In Brazil, we find no evidence of a relationship between trade policy and informality. In Colombia, we do find evidence of such a relationship, but only for the period preceding a major labor market reform that increased the flexibility of the Colombian labor market. These results point to the significance of labor market institutions in assessing the effects of trade policy on the labor market.

Market Integration and Convergence to the Law of One Price: Evidence from the European Car Market

This paper exploits the unique experiment of European market integration to investigate the relationship between integration and price convergence in international markets. Using a panel data set of car prices we examine how the process of integration has affected cross-country price dispersion in Europe. We find surprisingly strong evidence of convergence towards both the absolute and the relative versions of Purchasing Power Parity. Our analysis illuminates the main sources of segmentation in international markets and suggests the type of institutional changes that can successfully reduce it.