Panel Data Models with Nonadditive Unobserved Heterogeneity: Estimation and Inference

This paper considers fixed effects estimation and inference in linear and nonlinear panel data models with random coefficients and endogenous regressors. The quantities of interest -- means, variances, and other moments of the random coefficients -- are estimated by cross sectional sample moments of GMM estimators applied separately to the time series of each individual. To deal with the incidental parameter problem introduced by the noise of the within-individual estimators in short panels, we develop bias corrections. These corrections are based on higher-order asymptotic expansions of the GMM estimators and produce improved point and interval estimates in moderately long panels. Under asymptotic sequences where the cross sectional and time series dimensions of the panel pass to infinity at the same rate, the uncorrected estimator has an asymptotic bias of the same order as the asymptotic variance. The bias corrections remove the bias without increasing variance. An empirical example on cigarette demand based on Becker, Grossman and Murphy (1994) shows significant heterogeneity in the price effect across U.S. states.Comment: 51 pages, 4 tables, 1 figure, it includes supplementary appendi

Target-selective GABAergic control of entorhinal cortex output.

The medial entorhinal cortex (MEC) is a major center for spatial navigation and memory. We found that cannabinoid type 1 receptor-expressing GABAergic basket cells selectively innervated principal cells in layer II of the rat MEC that projected outside the hippocampus but avoided neighboring cells that give rise to the perforant pathway to the dentate gyrus. These results indicate that the organization of GABAergic microcircuits reflects the long-distance axonal targets of principal neurons

Compensation of thermal nonlinearity effect in optical resonators

Thermal nonlinearity is known to cause bistability in Whispering Gallery Mode (WGM) resonators and to destabilize the red slope of the Lorentzian resonant curve. We demonstrate an optical technique that allows compensation of the thermal effect and forces the resonances to appear linear with both red and blue slopes stable

Regulation of fast-spiking basket cell synapses by the chloride channel ClC-2.

Parvalbumin-expressing, fast-spiking basket cells are important for the generation of synchronous, rhythmic population activities in the hippocampus. We found that GABAA receptor-mediated synaptic inputs from murine parvalbumin-expressing basket cells were selectively modulated by the membrane voltage- and intracellular chloride-dependent chloride channel ClC-2. Our data reveal a previously unknown cell type-specific regulation of intracellular chloride homeostasis in the perisomatic region of hippocampal pyramidal neurons

Research complexity of Australian universities

Strategic research direction and prioritisation is crucial for decision making in universities. Analysis of research diversification and sophistication helps differentiating universities according to their research attributes. Based on the Microsoft Academic Graph data set, this paper conducts research complexity analysis for all Australian universities, and examines the ubiquity and diversity of the research output. This paper also investigates research complexity indices of Australian universities, with further discussions for universities with research leadership, technological and practical focuses, and young research universities

Hybrid integrated platform of PDMS microfluidics and silica capillary for effective CE and ESI-MS coupling

We present an effective hybrid integration of PDMS microfluidic devices and fused silica capillaries. These hybrid microfluidic integrated PDMS and silica capillary (iPSC) modules exhibit a novel architecture and method for leakage free CE sample injection requiring only a single high voltage source. Use of the iPSC devices is based on a modular approach which allows the capillary to be reused over 1,000 times whilst replacing the fluidics below it for different experiments. Integrating fused silica capillaries with PDMS microfluidics allows the direct application of a wide variety of well established conventional CE protocols for complex analyte separations and ESI-MS coupling, allowing users to focus on the sample analysis rather than the development of new separation protocols. The iPSC fabrication method is simple (3 steps) and quick (7 min)

A Study and Evaluation of the Automotive Program at the Utah State Agricultural College

As the graduates of colleges and universities receive their diplomas and leave their Alma Mater, a new and different challenge confronts them. Their problem now is not one of being free of the struggles of completing their education but rather the anticipation of what will be their success in the future. They feel that now they are qualified to take over new jobs and responsibilities for which they have been trained. Many will be successful in securing good positions in their respective fields (others may have to start at the bottom and gain their advancement through more learning while on the job)