نتایج جستجو برای: pseudo panel
تعداد نتایج: 133951 فیلتر نتایج به سال:
گونه papaver pseudo-orientale از بخش oxytona جنس papaver منبع مهمی برای آلکالوئید ها مانند ایزوتبائین است. در این پژوهش تولید کالوس و باززایی درون شیشه ای این گونه از ریز نمونه های هیپوکوتیل-کوتیلدون در محیط کشت پایه موراشیگ و اسکوگ (ms) و گامبورگ (b5) حاوی سطوح مختلف نفتالین استیک اسید (naa)، کینتین (kin) و یا بنزیل آدنین (ba) در دمای 20 درجه سانتیگراد و دوره نوری 16 ساعت روشنایی بررسی شد. تجز...
Theories of poverty traps stand in sharp contrast to the view that anybody can make it through hard work and thrift. However, empirical detection of poverty traps is complicated by the lack of long panels, measurement error, and attrition. This paper shows how dynamic pseudo-panel methods can overcome these difficulties, allowing estimation of non-linear income dynamics and testing of the prese...
A 74-year-old man with colorectal carcinoma treated with surgery and adjuvant chemotherapy with oxaliplatin and fluorouracil 6 years previously was admitted with fever and suspicion of sepsis. Laboratory tests showed hemoglobin 137 g/L, mean corpuscular volume 94.7 fL, platelets 177 109/L, leukocytes 2.0 109/L, and neutrophils 0.8 109/L. Within 4 days his condition deteriorated rapidly with pro...
Splice site selection is a key element of pre-mRNA splicing. Although it is known to involve specific recognition of short consensus sequences by the splicing machinery, the mechanisms by which 5' splice sites are accurately identified remain controversial and incompletely resolved. The human F7 gene contains in its seventh intron (IVS7) a 37-bp VNTR minisatellite whose first element spans the ...
We derive tests for heteroskedasticity after fixed effects estimation of linear panel models. The asymptotic results are based on a ‘large N fixed T ’ framework, where the incidental parameters problem is bypassed by utilizing a (pseudo) likelihood function conditional on the sufficient statistic for these parameters. A simple ‘studentization’ produces distribution free tests that can be easily...
This paper examines the determinants of the demand for private health insurance in the UK from 1978 to 1996. The focus is the impact of public and private sector quality on demand. Use of a pseudo-cohort panel allows examination of generational change and the investigation of dynamics. The results indicate that there has been generational change. Further, changes in the contractual status of se...
This paper is concerned about the allocation of households’ consumption expenditure over time in a life cycle environment. We construct a pseudo panel from a time series of cross sections using average cohort procedures. The parameters of a CRRA utility function with socio-demographic dependent marginal utility is then estimated by GMM using an Euler approach. Stochastic dynamic programming tec...
This study explores the determinants of health status and the effects of the air and noise pollution on health status in Turkey during the period 2006-2012. The additional costs associated with their impact on health status are estimated. A pseudo panel data created based on age and region cohorts and two and three stage least squares instrumental variables approaches are followed using wind di...
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