Gravity models
New Approach to Estimating Gravity Models with Heteroscedasticity and Zero Trade Values
... log-linearized gravity models to deal with the zero trade flows: (i) estimate the model using only observations for which trade values are non-zeros (censored data); or (ii) augment the dependent variable ...
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ENVIRONMENTAL EFFECTS IN MODIFIED GRAVITY MODELS
... standard gravity, the solution is not a cycloid, but similar: the sines and cosines are replaced by their hyperbolic ...standard gravity, the objects for which is true are about ...modified gravity ...
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Survey of gravity models of trade and labour, and a proposed trade employment gravity model for the Philippines
... Gravity models and its extensions have provided a lot of econometric advantages on modelling trade behaviour, from the earliest recorded historical data up to contemporary models, which are much ...
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Estimating Gravity Models of International Trade with Correlated Time Fixed Regressors: To IV or not IV?
... the gravity model (of trade, capital or migration flows among other interaction effects), which assigns a prominent role given to time-fixed variables in the regression ...the gravity model of trade as an ...
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Analysis of China’s Import from & Direct Investment in ASEAN—Based on Gravity Models
... Trade gravity model originates from the law of universal ...trade gravity model of trade between China and Southeast Asian ...nor gravity model is used in analyzing China’s direct in- vestment and ...
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The Poisson quasi maximum likelihood estimator: A solution to the “adding up” problem in gravity models
... invariant models are those for which the econometric specification includes, as in (2) and (3), a multiplicative constant to be ...estimated. Models that describe additive quantities, such as trade, ...
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De Sitter limit analysis for dark energy and modified gravity models
... In this paper, we first proceeded to define a gauge- invariant quantity which describes the linear density per- turbation of the dark energy field. Such a definition is very general and applicable both in the presence of ...
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Testing Some f(R,T) Gravity Models from Energy Conditions
... It is well known that General Relativity (GR) based on the Einstein-Hilbert action (without taking into account the dark energy) can not explain the acceleration of the early and late universe. Therefore, GR does not ...
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Policy Measurement and Multilateral Resistance in Gravity Models
... The treatment of the multilateral resistance terms in gravity estimations has evolved over the years and researchers have proposed various solutions (Piermartini and Yotov, 2016). In order to overcome the ...
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Flattening the inflaton potential beyond minimal gravity
... attractor models [12] where K = 1, Ω = 1 + ξ f (φ) and U = λ f 2 (φ) are taken, a small or vanishing inflation VEV is ...induced gravity models, the non-minimal coupling does not rescale the inflaton ...
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Trade Potential of India against BRCS Economies: An empirical analysis based on Gravity Model
... trade gravity model for India’s trading partners (Brazil, Russia, China and South Africa) has found that the gravity models for both 1995 and 2016 fit the data well and explain 75 percent and 76 ...
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Gravity model parameter calibration for large scale strategic transport models
... the gravity model that exists within the transport planning software package ...on gravity models within large scale strategic traffic ...The gravity model for trip distribution is based upon ...
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Three Essays on Applied Aspects of Transaction Costs.
... structural gravity models) represent the case in which (important) variables have been omitted; the bottom boxes present the case of inclusion of superfluous ...structural models show lower values of ...
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A spatial autoregressive Poisson gravity model
... In gravity models, the assumption that observations are mutually independent is a heroic assumption — as LeSage and Pace (2009, ...nature. Models of the type given by ...
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Shedding Light on the EOS-Gravity Degeneracy and Constraining the Nuclear Symmetry Energy from the Gravitational Binding Energy of Neutron Stars
... the models of the neutron-star matter EOSs and models of gravity applied to describe their ...when models of gravity are limited to classical GR and Scalar-Tensor (ST) theories, while ...
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Air traffic forecasting
... econometric models, time series and gravity models as the dominant quantitative approaches to estimate future air traffic demand and supply (Nam and Schaefer, ...the models to reproduce ...
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Empirical estimation of present-day Antarctic glacial isostatic adjustment and ice mass change
... different Gravity Recovery and Climate Exper- iment (GRACE) gravity models were evaluated and a new Ice, Cloud, and Land Elevation Satellite (ICESat) surface height trend map computed using an ...
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A gravity model of virtual water trade
... Several methods have been developed to deal with this issue and, for the sake of brevity, one can distinguish those that get rid of all country- and role-specific terms (as Tetrad, used in Head et al., 2010) and those ...
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The Geo-economic Gravity Systems as a Tool for the Analysis of Socio-Economic Polarization in a Society: Country Case Study and Geographic Information Modelling Explain Long-term Transformation Potential towards Increased Regional Attractiveness and...
... “Geo-Economic Gravity System” will be discussed as a methodological tool in regard with the key issue of “regional efficiency”, as well as a modeling tool in the effort to face relevant socio-economic ...
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The distribution of Chinese minority populations and its change based on the study of the Hu Huanyong line
... of gravity during 1953–2010 may reflect the dynamic evolutionary characteristics of the spatial distribution of minor- ity ...of gravity was located in Runan County, Zhumadian City, Henan Province and the ...
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