We present near–infrared, H–band (1.65μm), surface photometry of 174 spiral galaxies in the area of the Pisces–Perseus supercluster. The images, acquired with the ARNICA camera mounted on various telescopes, are used to derive radial profiles of surface brightness, ellipticities, and position angles, together with global parameters such as H-band magnitudes and diameters . The mean relation bet...

This paper investigates the degree of intergenerational transmission of education over a sample of respondents in the National Longitudinal Survey of Youth 1979. Rather than employing instrumental variables procedures to estimate the causal e¤ect of parental education we identify it by exploiting the feature of the educational transmission mechanism that is responsible for its endogeneity. More...

We investigate the role of externalities in tax evasion arising from congestion of the auditing resources available to local tax authorities. The empirical analysis employs a novel method due to Graham (2008) that mitigates most of the problems that surround the identification of endogenous social effects [Manski (1993)]. Identification exploits the information contained in the variance of conc...

(1) Estimation of grazing livestock intake is the basis for studying animal–plant relationships and nutritional status has important implications grassland composition productivity. (2) We used saturated alkanes method to determine feed vegetation nutrient digestibility at different intensities in months. (3) found that C31 had highest concentration both pasture fecal output, average recovery w...

We contribute to the literature on the determinants of socioeconomic health disparities by studying how the health behavior of adolescents may arise from the degree of communication between parent and child. Parent-child communication may function as a mediator between family background and subsequent poor health behavior, potentially reconciling previous mixed evidence on the relationship betw...

The restoration of an uncontrolled phosphogypsum landfill was investigated for its effects on the seasonal distribution of phytoplankton, ciliates, and copepods. Sampling was carried out monthly from September 2007 to August 2008 at four ponds of increasing salinity (A1, 41 psu; A5, 46 psu; A16, 67 psu; and C31, 77 psu) in the Sfax solar saltern (southeastern Tunisia). Physicochemical and biolo...

This paper develops a strategy for identification and estimation of complete information games that does not require a regressor that has large support, nor a parametric specification for the distribution of the unobservables. The identification result uses a non-standard but plausible condition on the unobservables: the assumption that the joint density of the unobservables of all agents is un...

The National Optics Institute has recently developed an optical velocimeter composed of two parallel laser beams for measuring perpendicularly the speed and the length of vehicles. The system must be capable of measuring speeds varying from 0 to 150 km/h in both directions with an accuracy of 1%. This paper focuses on the algorithms and signal processing aspects of the system. The speed is meas...