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This paper proposes some additional moment conditions for the linear
feedback model with explanatory variables being predetermined, which is
proposed by  for the purpose of dealing with count panel data. The newly
proposed moment conditions include those associated with the equidispersion,
the Negbin I-type model and the stationarity. The GMM estimators are
constructed incorporating the additional moment conditions. Some Monte Carlo
experiments indicate that the GMM estimators incorporating the additional
moment conditions perform well, compared to that using only the conventional
moment conditions proposed by [2,3].
A compression wave is generated ahead of a high-speed train, while entering a tunnel. This compression wave propa- gates to the tunnel exit and spouts out as a micro pressure wave, causing an exploding sound. In order to estimate the magnitude correctly, the mechanism of the attenuation and distortion of a compression wave propagating along a tunnel must be understood and experimental information on these phenomena is required. An experimental and numerical in- vestigation is carried out to clarify the mechanism of the propagating compression wave in a tube. The final objective of our study is to understand the mechanism of the attenuation and distortion of propagating compression waves in a tun- nel. In the present paper, experimental investigations are carried out on the transition of the unsteady boundary layer induced by a propagating compression wave in a model tunnel by means of a developed laser differential interferometry technique.
introduces a core concept in an economy with an excludable public good. In the
economy, we assume that each coalition is allowed to achieve an allocation via
a menu, a kind of a nonlinear price. Our core concept is called the
menu-induced core that is defined as the set of allocations achievable by menus
that are robust against all coalitional improvements achieved via menus. We
show that the menu-induced core is nonempty. We also investigate certain
properties of the menu-induced core that show the difference between the
menu-induced core and the core defined in a standard way.