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On estimation of gravity equation: A cluster analysis
2014This article questions the slope homogeneity in a gravity equation and proposes a partially heterogeneous framework for its estimation using panel data. We suggest to employ K-mean clustering to group countries according to the gravity equation variables. Further, the gravity model is estimated on these created homogeneous groups.
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Modeling Soil Water Redistribution under Gravity Irrigation with the Richards Equation
Mathematics, 2020Carlos Chavez +2 more
exaly
On Schrödinger equations in Einstein's theory of gravity
1998This paper deals with the Hamiltonian formalism and consecutive canonical quantization of a system composed by incoherent matter coupled with its own gravitational field. The system is studied within the framework of general relativity. Incoherent matter is described by giving a line congruence and assuming that the energy of the matter satisfies a ...
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A note on the proper econometric specification of the gravity equation
Economics Letters, 2000Peter Egger
exaly
Gravity and zonal flows of giant planets: From the Euler equation to the thermal wind equation
Journal of Geophysical Research E: Planets, 2017David Stevenson, Hao Cao
exaly
Bilateral trade volumes, the gravity equation and factor proportions
Journal of International Trade and Economic Development, 2009Andrzej Cieślik
exaly