We have obtained lowand medium-resolution optical spectra of 20 candidate young low-mass stars and brown dwarfs in the nearby Chamaeleon II dark cloud, using the Magellan Baade telescope. We analyze these data in conjunction with near-infrared photometry from the 2-Micron All Sky Survey. We find that one target, [VCE2001] C41, exhibits broad Hα emission as well as a variety of forbidden emissio...

Am I Missing Something? The Effects of Absence from Class on Student Performance We exploit a rich administrative panel data-set for cohorts of Economics students at a UK university in order to identify causal effects of class absence on student performance. We utilise the panel properties of the data to control for unobserved heterogeneity across students and hence for endogeneity between abse...

The recent availability of large data sets covering single transactions on nancial markets has created a new branch of econometrics which has opened up a new door of looking at the microstructure of nancial markets and its dynamics. The speci c nature of transaction data such as the randomness of arrival times of trades, the discreteness of price jumps and signi cant intraday seasonalities, cal...

We estimate a spatially explicit model of the forest clearance process among smallholder farmers in an agricultural frontier of southern Mexico. Our analysis takes as its point of departure a simple utility-maximising model that suggests many possible determinants of deforestation in an economic environment characterised by missing or thin markets. Hypotheses from the model are tested on a data...

This paper generalizes existing econometric models for censored competing risks by introducing a new flexible specification based on a piecewise linear baseline hazard, time-varying regressors, and unobserved individual heterogeneity distributed as an infinite mixture of Generalized Inverse Gaussian (GIG) densities, nesting the gamma kernel as a special case. A common correlated latent time eff...

Two measures of unemployment duration were obtained for each individual from data collected by Istat through the Quarterly Labour Force Survey. One measure was the length of on-going spells of unemployment, declared by the interviewed individual in a first wave and suitably adjusted considering information in a second wave (Spell Answers). The other was the time elapsed between the dates of the...

Bacterial cellulose (BC) exhibits unique properties such as high purity compared to plant-based cellulose; however, commercial production of BC has remained a challenge, primarily due to the strain properties of cellulose-producing bacteria. Herein, we developed a functional and stable BC production system in genetically modified (GM) Escherichia coli by recombinant expression of both the BC sy...

Unequal Chances on the Transitional Labor Market: The Case of the Netherlands The emergence of a transitional labor market offers new opportunities to workers, but at the same time bears the risk of (new) inequalities. This paper deals with unequal chances on the transitional labor market in the Netherlands, in particular for workers from the four largest immigrant groups: Turks, Moroccans, Sur...

The empirical analysis in this paper adopts logit models to study the hazard rate of ceasing from work by the next year for Italian older employees. The speci…cations are estimated resorting to the framework proposed by Güell and Hu (2006), which extracts information from repeated independent cross-sections to recover the hazard rate of interest at the individual level. The sample is drawn from...