While all the cosmological observations are carried out on a light-cone, the null hypersurface of an observer at z = 0, the clustering statistics has been properly defined only on the constant-time hypersurface. We develop a theoretical formulation for a two-point correlation function on the light-cone, and derive a practical approximate expression relevant to the discussion of clustering of hi...

Estimation of Rybczynski e®ects in a sample of 14 developing countries over 1982-1992 reveals a puzzle: labor-intensive manufacturing sectors tend to expand and capital-intensive manufacturing sectors contract as country capital abundance increases, after allowing for changes in technology, skill, and trade barrier. Empirical tests show strong evidence of multiple diversi ̄cation cones in the fu...

M-theory effects prevent five-dimensional domain-wall and black-hole solutions from developing curvature singularities. While so far this analysis was performed for particular models, we now present a model-independent proof that these solutions do not have naked singularities as long as the Kähler moduli take values inside the extended Kähler cone. As a by-product we obtain information on the ...