ILR Impact Brief – Gender, Promotion, and Raises: Sometimes the Advantage Goes to Men

Prior studies looking at gender discrimination in the workplace, in the form of promotions and/or raises, have yielded mixed results. Research focusing on promotions has found that women are promoted less often than men, more often than men, and at equal rates. Research assessing both promotions and wages, grounded in the notion that promotions signal a status change that warrants additional compensation, has also produced no consensus on outcomes. This particular study, however, used unique data on recently hired workers at a broad sample of companies that enabled the authors to control for workers’ job performance, educational attainment, and other characteristics, as well as company characteristics such as profit/not-for-profit status, industry, establishment size, and percent of the workforce covered by a union contract in order to analyze gender differences in actual and expected promotions and accompanying wage gains

New Evidence on Gender Difference in Promotion Rates: An Empirical Analysis of a Sample of New Hires

Using a large sample of establishments drawn from the Multi-City Study of Urban Inequality (MCSUI) employer survey, we study gender differences in promotion rates and in the wage gains attached to promotions. Several unique features of our data distinguish our analysis from the previous literature on this topic. First, we have information on the wage increases attached to promotions, and relatively few studies on gender differences have considered promotions and wage increases together. Second, our data include job-specific worker performance ratings, allowing us to control for performance and ability more precisely than through commonly-used skill indicators such as educational attainment or tenure. Third, in addition to standard information on occupation and industry, we have data on a number of other firm characteristics, enabling us to control for these variables while still relying on a broad, representative sample, as opposed to a single firm or a similarly narrowly-defined population. Our results indicate that women have lower probabilities of promotion and expected promotion than do men but that there is essentially no gender difference in wage growth with or without promotions.

Michael S. Mahoney, 1939–2008

Perhaps the clearest testimony to the scholarly range and depth of Princeton's now‐lamented Michael S. Mahoney lies in the dismay of his colleagues in the last few years, as they contemplated his imminent retirement. How to maintain coverage of his fields? Fretting over this question, the program in history of science that he did so much to build recently found itself sketching a five-year plan that involved replacing him with no fewer than four new appointments: a historian of mathematics with the ability to handle the course on Greek antiquity, a historian of the core problems of the Scientific Revolution, a historian of technology who could cover the nineteenth‐century United States and Britain, and, finally, a historian of the computer-and-media revolution. In his passing we have lost a small department

Thermodynamic properties of Mg_2SiO_4 liquid at ultra-high pressures from shock measurements to 200 GPa on forsterite and wadsleyite

Polycrystalline samples of Mg_2SiO_4 forsterite and wadsleyite were synthesized and then dynamically loaded to pressures of 39–200 GPa. Differences in initial density and internal energy between these two phases lead to distinct Hugoniots, each characterized by multiple phase regimes. Transformation to the high-pressure phase assemblage MgO + MgSiO_3 perovksite is complete by 100 GPa for forsterite starting material but incomplete for wadsleyite. The datum for wadsleyite shocked to 136 GPa, however, is consistent with the assemblage MgO + MgSiO_3 post-perovksite. Marked increases in density along the Hugoniots of both phases between ∼130 and 150 GPa are inconsistent with any known solid-solid phase transformation in the Mg_2SiO_4 system but can be explained by melting. Density increases upon melting are consistent with a similar density increase observed in the MgSiO_3 system. This implies that melts with compositions over the entire Mg/Si range likely for the mantle would be negatively or neutrally buoyant at conditions close to the core-mantle boundary, supporting the partial melt hypothesis to explain the occurrence of ultra-low velocity zones at the base of the mantle. From the energetic difference between the high-pressure segments of the two Hugoniots, we estimate a Grüneisen parameter (γ) of 2.6 ± 0.35 for Mg_2SiO_4-liquid between 150 and 200 GPa. Comparison to low-pressure data and fitting of the absolute pressures along the melt Hugoniots both require that γ for the melt increases with increasing density. Similar behavior was recently predicted in MgSiO_3 liquid via molecular dynamics simulations. This result changes estimates of the temperature profile, and hence the dynamics, of a deep terrestrial magma ocean

Revolutionary Ideology in the Information Age: Technology of the Occupy Wall Street Movement

The research presented in this project draws heavily on themes of social justice and human rights. The purpose of this inquiry is twofold. For one, it functions as an SIT Graduate Institute “Capstone,” which meets the graduation requirements for a Master’s degree from the school. Secondly, the function of this project is to provide a space to investigate how the theory and practice of contemporary social change utilizes today’s most powerful non-militaristic technology. The focus of my research is particularly concerned with my own participant observation in the Occupy Wall Street movement, which emerged in the United States in late 2011. The body of this document is divided into three sections, corresponding with the research methodology of a qualitative inquiry. Data is first presented in the form of an experiential testimony. This data is then interpreted as themes are extrapolated and framed in terms of how human rights are related to modern technology. Finally, my findings are then analyzed and discussed in terms of two established theoretical frameworks. These frameworks—which are identified as the Dialectical Method and Technological Determinism—represent two vastly different perspectives of how technology evolves. Yet, the data and analysis presented in this project show how these two frameworks arrive at similar conclusions when considered in conjunction with human rights and social change

PREDICTION MARKETS: PRACTICAL EXPERIMENTS IN SMALL MARKETS AND BEHAVIOURS OBSERVED

This paper discusses a series of prediction markets created and operated in the summer of 2006 to measure calibration and behaviour of small-scale prediction markets. The research finds that small markets are very well calibrated and determines a potential minimum threshold of participation to ensure well-calibrated results. The results also established the markets as very efficient at predicting small probabilities. Behavioural aspects of markets are also examined. Trader behavioural types are assessed and categorised; while a small group of traders were extremely active, over half of all traders rarely traded. Market manipulation is examined and found to be occasionally effective, though only in very small markets. Finally, incentives to trade are discussed; these markets were effective with no incentives for trading at all

Simultaneous aluminum, silicon, and sodium coordination changes in 6 GPa sodium aluminosilicate glasses

We present the first direct observation of high-coordinated Si and Al occurring together in a series of high-pressure sodium aluminosilicate glasses, quenched from melts at 6 GPa. Using ^(29)Si MAS NMR, we observe that a small amount of Al does not have a significant effect on the amount of ^VSi or ^(VI)Si generated, but that larger Al concentrations lead to a gradual decrease in both these species. ^(27)Al MAS NMR spectra show that samples with small amounts of Al have extremely high mean Al coordination values of up to 5.49, but that larger Al concentrations cause a gradual decrease in both ^VAl and ^(VI)Al. Although mean Al and Si coordination numbers both decrease with increasing Al contents, the weighted combined (Al+Si) coordination number increases. Silicon and Al resonances shift in frequency with increasing pressure or changing Al concentration, indicating additional structural changes, including compression of network bond angles. Increases in the ^(23)Na isotropic chemical shifts indicate decreases in the mean Na-O bond lengths with increasing pressure, which are more dramatic at higher Al contents. Recovered glass densities are about 10 to 15% greater than those of similar ambient pressure samples. However, the density increases due to the combined coordination changes of Al and Si are estimated to total only about 1 to 2%, and are roughly constant with composition despite the large effects of Al content on the individual coordinations of the two cations. Thus, effects of other structural changes must be significant to the overall densification. Apparent equilibrium constants for reactions involving the generation of high-coordinated species show systematic behavior, which suggests an internal consistency to the observed Si and Al coordination number shifts