نتایج جستجو برای: heckman two step procedure
تعداد نتایج: 3054477 فیلتر نتایج به سال:
OBJECTIVE Early diagnosis of gestational diabetes mellitus (GDM) is important for both maternal and fetal health. The literature has varying recommendations about one-step and two-step tests for GDM screening and diagnosis. The present study aimed to investigate the difference in the cost and duration of hospital stay of a one-step procedure compared to a two-step procedure, which is routinely ...
Purpose This study aims to examine the relationship between CEO busyness and financial reporting quality in a country which implements two-tier board system. Design/methodology/approach includes firms listed on Indonesian Stock Exchange during 2010–2018 period. employs an ordinary least squares regression, propensity score matching procedure, Heckman two-stage regression testing hypothesis. Fin...
We evaluate the impact of firm-specific export subsidies on exports in Colombia. Using a two-stage Heckman selection procedure, we obtain firm-specific predicted subsidy amounts that can be explained by the characteristics that determine the firms’ eligibility for the government support and its amount. Drawing on the accounts of the discretionary allocation of subsidies in developing countries,...
This paper presents a methodology for the assessment of ductility and strength capacities in low-rise buildings. This method utilizes the characteristics of force-displacement for the lowest story level or considers the weakest story in any given low-rise building for its primary analysis. Calculations are based on two levels of earthquake motions, namely strong earthquakes (PGA=0.3 g), and ver...
This article demonstrates a new approach for nonlinear finite element analysis. The methodology is very suitable and gives very accurate results in linear as well as in nonlinear range of the material behavior. Proposed methodology can be regarded as stress based finite element analysis as it is required to define the stress distribution within the structural body with structural idealization a...
The gravity model of international trade is often applied by economists to explain bilateral between countries. Nevertheless, some estimation practices have been subject criticism, namely how zero values and the heteroskedasticity are handled. This paper proposes new nonlinear techniques address these issues. In particular, we propose standard generalized versions Heckman two-step approach that...
This study is aimed to investigate the effects of trade policy uncertainty (T.P.U.) on flow 113 emerging economies and low-income developing countries 143 destination countries. It further investigates T.P.U. based income heterogeneity. Moreover, it considers between countries’ pair non-manufacture trade. The two-step Heckman sample selection model applied run structural gravity using three-yea...
Cells isolated enzymatically from the interstitial tissue of mouse male gonads are composed of macrophages, Leydig cells, and myofibroblasts. They can be separated on density gradients, either by sedimentation (Ficoll) or flotation (Percoll) into several fractions according to the different buoyant densities of the different cells in the mixture. Macrophages (Fc gamma R+, esterase+) present in ...
A method is presented for purifying papain from extracts of papaya latex. The procedure involves precipitation of the extract of papaya latex with sodium chloride followed by affinity chromatography of the redissolved precipitate. Precipitation of the protein from the latex extract is necessary to separate the papain from material which interferes with the binding of papain to the affinity colu...
Airborne LiDAR with simultaneous photographic data acquisition is an effective technique for 3D data collection with colour or textural information. Flight planning for airborne LiDAR data collection ensures the desired qualities in the data. While the desired quality of data is enforced by adopting the appropriate flight planning parameters during the flight operations, attempt is also made to...
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