3,553,716 research outputs found
Critical dimensions for random walks on random-walk chains
The probability distribution of random walks on linear structures generated
by random walks in -dimensional space, , is analytically studied
for the case . It is shown to obey the scaling form
, where is
the density of the chain. Expanding in powers of , we find that
there exists an infinite hierarchy of critical dimensions, ,
each one characterized by a logarithmic correction in . Namely, for
, ; for ,
; for , ; for , ; for , , {\it etc.\/} In particular, for
, this implies that the temporal dependence of the probability density of
being close to the origin .Comment: LATeX, 10 pages, no figures submitted for publication in PR
Electricity, Highways and Manufacturing Growth: A Cost Based Estimate
This paper studies the rqle of electricity and highways on the Mexican manufacturing sector. The paper uses a weighted aggregate in put of labor and capital (with weights equal to their share in costs) and a weighted measure of infrastructure to estimate jointly the elasticity of infrastructure and the degree of internal returns to scale. 1 pool two digit industries to obtain the estimates for the whole manufacturing sec tor. This paper follows the first order tradition initiated by Solow (1957) and Hall (1988a, b). For the entire manufacturing sector, 1 find that a weighted average index of both types of infrastructure has a significant effect on manufacturing growth. At the sectoral level the evidence is mixed.infrastructure, returns to scale, external effects
The Prudence of Mexican Consumers
The ENIGH household surveys are used to investigate the strength of the precautionary motive in Mexico, using pseudo-panel methods to obtain estimates of the coefficient of relative prudence for Mexican consumers. The method provided accounts for the aggregation problems arising from unequally-spaced surveys. The low levels of prudence found can help explain why consumers had insufficient savings to smooth consumption during the peso crisis. Differences in prudence may also explain the low household savings rates in Mexico compared to the high savings rates in East Asian countries such as Taiwan.prudence, pseudo-panel, aggregation
Generalized Parton Distributions at x->1
Generalized parton distributions at large are studied in perturbative QCD
approach. As and at finite , there is no dependence for the
GPDs which means that the active quark is at the center of the transverse
space. We also obtain the power behavior: for pion; and
for nucleon, where
represents the additional dependence on .Comment: 7 pages, 2 figure
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