Sowing legume-rich pastures make compatible an increase in production with the conservation of plant diversity of mediterranean dehesas

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Adult mortality and investment: a new explanation of the English agricultural productivity in the 18th century.

We claim that the exogenous decline of adult mortality at the end of the seventeenth century can be one of the causes driving both the decline of interest rate and the increase in agricultural production per acre in preindustrial England. Following the intuition of the life-cycle hypothesis, we show that the increase in adult life expectancy must have implied less farmer impatience and it could have caused more investment in nitrogen stock and land fertility, and higher production per acre. We analyse this dynamic interaction using an overlapping generation model and show that the evolution of agricultural production and capital rates of return predicted by the model coincide fairly well with their empirical pattern.

WAS MALTHUS RIGHT? A VAR ANALYSIS OF ECONOMIC AND DEMOGRAPHIC INTERACTIONS IN PRE-INDUSTRIAL ENGLAND

This paper shows that the interaction between economic and demographic variables in England before the onset of modern economic growth did not fit some crucial assumptions of the Malthusian model. I estimated a vector autoregression for data on fertility, nuptiality, mortality and real wages over the period 1541-1840 applying a well-known identification strategy broadly used in macroeconomics. The results show that endogenous adjustment of population to real wages functioned as Malthus assumed only until the 17th century: positive checks disappeared during the 17th century and preventive checks disappeared before 1740. This implies that the endogenous adjustment of population levels to changes in real wages -one of the cornerstones of the Malthusian model- did not work during an important part of the period usually considered within the “Malthusian regime”.

Mu-tau neutrino refraction and collective three-flavor transformations in supernovae

We study three-flavor collective neutrino transformations in the dense-neutrino region above the neutrino sphere of a supernova core. We find that two-flavor conversions driven by the atmospheric mass difference and the 13-mixing angle capture the full effect if one neglects the second-order difference between the muon and tau neutrino refractive index. Including this "mu-tau matter term" provides a resonance at a density of approximately 3 x 10^7 g cm^-3 that typically causes significant modifications of the overall electron neutrino and antineutrino survival probabilities. This effect is surprisingly sensitive to deviations from maximal 23-mixing, being different for each octant.Comment: 9 pages, 7 figures. New presentation of results, version to be published in PR

An analysis of a regular black hole interior model

We analyze the thermodynamical properties of the regular static and spherically symmetric black hole interior model presented by Mboyne and Kazanas. Equations for the thermodynamical quantities valid for an arbitrary density profile are deduced, and from them we show that the model is thermodynamically unstable. Evidence is also presented pointing to its dynamical instability. The gravitational entropy of this solution based on the Weyl curvature conjecture is calculated, following the recipe given by Rudjord, Gr$\varnothing$n and Sigbj$\varnothing$rn, and it is shown to have the expected behavior.Comment: 22 pages, 17 figures, accepted for publication in International Journal of Theoretical Physic

A Methodological approach to estimating the Money Demand in Pre-Industrial Economies: Probate Inventories and Spain in the 18th century

The study of monetary phenomena and the understanding of price determination in Modern Europe are too often limited by the scarcity of good-quality data sets on the evolution across time of variables like money holdings, income, or wealth. In this paper we show that the information contained in probate inventories can be extremely useful to circumvent that problem. In particular, combining a data set of 114 inventories from Palencia (North of Spain) between 1750 and 1770 with census information (Catastro de Ensenada) we make a cross-section estimation of a money demand which is the first one ever produced for any period before the 19th century. The results provide meaningful insights about the relation between money demand and wealth, urbanization and structural change in a pre-industrial economy and highlight the potential of probate inventories to improve our knowledge of the monetary history of Modern Europe.

Regional index of sustainable economic well-being development project: final report

This report presents results from a development project carried out by nef (the new economics foundation) on behalf of emda (the East Midlands Development Agency) and Natural England, to improve the methodologies used in the calculation of the R-ISEW (Regional Index of Sustainable Economic Well-Being)