In the presence of selection bias the traditional estimators for pseudo panel data models are inconsistent. This paper discusses a method to achieve consistency in static linear pseudo panels in the presence of selection bias and a testing procedure for sample selection bias. The authors’ approach uses a bias correction term proportional to the inverse Mills ratio with argument equal to the “no...

abstract this papare is resaults of analysing the data which reported from a harvesting project. the site for collecting data is buildings' roofs of azad islamic university of mashhad. a rain gauge and a small reservoir (capacity is 4 cubic meters) were set at this site. then the amount of precipitation and its runoff were measured during two years (from 1386, dey, 23 to 1388, tir, 3).the sampl...

the cold climate is a favorable parameter for the development of tension cracks and decrease of rock brittleness. therefore, this paper attempts to investigate the hamekasi porous limestone in order to predict the brittleness indices during freeze-thaw cycles. the freeze–thaw test was executed for one cycle including 16 h of freezing, and 8 h of thawing. the geo mechanical properties and brittl...

For the estimation of the parameters involved in a linear dynamic mixed model for panel data, it has been shown recently by Rao, Sutradhar, and Pandit (2012, Brazilian J. of Probability and Statistics, Vol. 26, 167–177) that the so-called generalized quasi-likelihood (GQL) approach produces more efficient regression estimates as compared to the generalized method of moments (GMM) approach. Thes...

Objectives: One of the most disabling impairments following stroke is upper limb impairment. Despite the important role of somatosensory function in motor control and high prevalence of somatosensory deficits in stroke survivors, little attention has been paid to its effect on UE motor function in chronic stroke survivors. Thus, the aim of this study is to explore the correlation between differ...

Testing the presence of serial correlation in the error terms of a fixed effects regression model is important for many reasons. While there have been a number of testing procedures developed so far (see, e.g., Bhargava, Franzini and Narendranathan (1982), Baltagi and Li (1995), Baltagi and Wu (1999), Bera et al. (2001), Wooldridge (2002), Drukker (2003), Hong and Kao (2004) and Inoue and Solon...

modeling of drying kinetics of canola was studied at 30 to 100 ?c in a lab scale fluidized bed dryer. drying rate of the crop was assessed, using many conventional moisture ratio models employed in food science. effective diffusivity coefficient (deff) and activation energy (ea) of kernel moisture were determined using fick's law of diffusion and arrhenius equation. besides, the effects of...