نتایج جستجو برای: c25

تعداد نتایج: 671  

Journal: : 2021

IDA is a parametric analysis method that has used commonly in several different forms to assess the structural performance under seismic loadings. This paper focuses on effect of tension reinforcement ratio and concrete strength reinforced (RC) structures. For numerical analysis, two RC frame type structures were selected. One them 5 stories other 7 stories. Two class, C20 C25, considered three...

Journal: :Bioresources 2022

The current study was conducted to identify the most important variables in activation phase of cellulose acetate production. Dry alpha pulp as raw material supplied by a local company with intrinsic properties viscosity equal 926 mL/g and water content 96%. In this regard, variables, including reaction time (T30, T60, T90 min), addition level acetic acid (C25, C35, C45 units per 100 dry cellul...

2012
Yingying Dong Arthur Lewbel

Regression discontinuity models, where the probability of treatment jumps discretely when a running variable crosses a threshold, are commonly used to nonparametrically identify and estimate a local average treatment effect. We show that the derivative of this treatment effect with respect to the running variable is nonparametrically identified and easily estimated. Then, given a local policy i...

Journal: :CoRR 2017
Mogens Fosgerau Emerson Melo André de Palma Matthew Shum

This paper establishes a general equivalence between discrete choice and rational inattention models. Matejka and McKay (2015, AER) showed that when information costs are modelled using the Shannon entropy function, the resulting choice probabilities in the rational inattention model take the multinomial logit form. By exploiting convex-analytic properties of the discrete choice model, we show ...

Journal: :Applied and environmental microbiology 1990
C Allison G T Macfarlane

The physiological and nutritional factors that regulate protease synthesis in Clostridium sporogenes C25 were studied in batch and continuous cultures. Formation of extracellular proteases occurred at the end of active growth and during the stationary phase in batch cultures. Protease production was inversely related to growth rate in glucose-excess and glucose-limited chemostats over the range...

2012
Aya Takahashi Nao Fujiwara-Tsujii Ryohei Yamaoka Masanobu Itoh Mamiko Ozaki Toshiyuki Takano-Shimizu

Intraspecific variation in mating signals and preferences can be a potential source of incipient speciation. Variable crossability between Drosophila melanogaster and D. simulans among different strains suggested the abundance of such variations. A particular focus on one combination of D. melanogaster strains, TW1(G23) and Mel6(G59), that showed different crossabilities to D. simulans, reveale...

2009
Martin Achtnicht

Motorized individual transport strongly contributes to global CO2 emissions, due to its intensive usage of fossil fuels. Current political efforts addressing this issue (i.e. emission performance standards in the EU) are directed towards car manufacturers. This paper focuses on the demand side. It examines whether CO2 emissions per kilometer is a relevant attribute in car choices. Based on a ch...

2011
Youngho Kang

Unlike policy makers‟ belief that geographical proximity to incumbent exporters encourages non-exporters to start exporting through positive information externalities, the empirical evidence in early studies is mixed. To make a contribution to fill the gap, this paper reexamines the relationship between the spatial and industrial agglomeration of exporting firms and the probability of being an ...

2007
Hisatoshi Tanaka

The dichotomous choice contingent valuation has been one of the most popular method to estimate Willingness-To-Pay (WTP) for nonmarket goods, such as environmental resources. Standard estimation procedures rely upon fully parametric assumptions on the model. This paper provides a new semiparametric estimation of the WTP distribution, which consists of three steps: In the first step, a finite-di...

1998
Tülin Erdem Michael P. Keane Baohong Sun

Discrete choice models have been widely estimated on scanner panel data to study consumer choice. One challenge in scanner panel research is that only the prices of the items bought are recorded. The ad hoc models used to fill in the missing prices of non-purchased brands may create a self-selection bias in estimating consumer price sensitivities. This type of bias is also present in existing s...

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