Recruitment Policy When Firms Observe Workers' Employment Status: an Equilibrium Search Approach

This paper considers an equilibrium search model, where firms use information on a worker's labour market status when recruiting new hires, and all workers search for a job. We show that firms segment their workforce in two. Unemployed workers are offered a lower wage than the workers they recruit from employment in a competing firm even when these workers have the same productivity. The unique equilibrium is given by the Diamond outcome in the market for unemployed workers and the Burdett and Mortensen (B-M) outcome in the market for employed workers. We show that the offer and earnings distributions derived in the model are first order stochastically dominated by the ones given in B-M and all workers are worse off. We also show that in this environment information on employment status is sufficient for firms to obtain the same profits as if they had complete information about workers' reservation wages and outside offers.

DIVERSITY AND HABITAT PROFILE OF THE SHALLOW WATER HOLOTHURIANS IN CAMOTES ISLANDS, CENTRAL PHILIPPINES

Species diversity and habitat profile of holothurians in Camotes Islands, Cebu Philippines were studied as baseline data for resource and ecological management. A 150 meter transect was laid in sandy, muddy and rocky substrates of the coastal barangays during the day and night assessments of the four municipalities of Camotes Islands which are San Francisco, Poro, Tudela and Pilar. Physico-chemical instruments and interview guide to the gleaners were used to gather data. Actual collection of specimen and other data was done in every 10 meter distance in the transect where a 1m quadrat was used. Results show that there are 20 species of holothurians belonging to 3 families namely Holothuriidae, Stichopodidae and Synaptidae. There are 2 species found in sandy substrate; 10 in muddy substrate; 2 in pure rocky substrate and 6 found in both rocky and muddy substrates. Results further show that there are 13 common species of Holothurians found in the four municipalities. The most diverse municipality is San Francisco which has 18 species followed by Poro (15); Pilar (14) and Tudela (13). For the distinct species, Holothuria rigida is found only in San Francisco followed by Pearsonothuria graffei (in Tudela and Pilar); Physico-chemical parameters like salinity, range from 23-38 ppt; temperature is 260C-350C, pH 4.5-8.0 both day and night assessments. Substrate grain size analysis shows that 100 microns dominate the amount of substrates in all the barangays, followed by 200 microns and then 400 microns. Keywords: Diversity, Habitat Profile, Holothurians, Camotes Island

Explaining Currency Crises: A Duration Model Approach

This paper is an empirical investigation into the duration of exchange rate episodes characterized by the absence of speculative attacks. We estimate a duration model for OECD countries during the 1970-1997 period. Specifically, we use semi-parametric methods to estimate model with unrestricted base-line hazards. The use of duration models allows us to account for duration dependence among the determinants of the likelihood of speculative attacks. We can test if the length of the time already spent on the peg is a determinant of the probability of exit into a currency crisis state. The results indicate, first, that increases in export growth, bank deposits growth and openness predict a decrease in the probability of exit into a currency crises state. Whereas, increases in import growth; claims on government and capital inflows in terms of portfolio investment and appreciated REER, contribute positively to the likelihood of an occurrence of a crisis. And second, the existence of a highly significant negative duration dependence. The highest probability of exit into a currency crash state is given at the initial of the peg, decreasing afterwards. This suggests the existence of a political cost of realignment that changes over the duration of the spell;growing credibility surrounding an exchange-rate-based stabilization program reduce the probability that the peg will be abandoned.Currency crises, speculative attacks, exchange rates, hazard functions, duration models

Alcachofa de Tudela, Cynara scolymus L., y suelo de cultivo analizados por Fluorescencia de Rayos X (FRX)

En este trabajo presentamos la composición elemental analizada por Fluorescencia de Rayos X (FRX): a) de la planta entera de alcachofa de Tudela en cada uno de los estadíos biológicamente significativos del ciclo agrícola: zuecas, planta tomada, planta en primera brotación, planta en estadío de roseta, planta en segunda brotación, planta en plena producción y zuecas obtenidas de la planta; b) de las inflorescencias de la alcachofa de Tudela en tres momentos distintos de su recolección; c) de las inflorescencias de otras tres variedades de alcachofa -INIA-D, “in vitro” y crisantem- cultivadas en Navarra; y d) del suelo de cultivo muestreado secuencialmente a lo largo del ciclo agrícola. La alcachofa se ha cultivado al aire libre en dos parcelas situadas en la Ribera Tudelana, Cadreita y Tudela. Tanto el suelo, el clima como las técnicas culturales son los idóneos aconsejados por el Instituto Técnico y de Gestión Agrícola y empleados desde antiguo por los agricultores de la zona. Los análisis elementales se han realizado en los Servicios Científico-Técnicos de la Universidad de Barcelona. Se han analizado 22 muestras de planta y 24 muestras de suelo. En planta se han obtenido 154 datos de concentraciones para 7 elementos -Na, Mg, P, S, Cl, K y Ca-; en suelo, 702 datos de concentraciones para 27 elements -Na, Mg, Al, Si, P, K, Ca, Ti, V, Mn, Fe, Co, Ni, Cu, Zn, Ga, Rb, Sr, Y, Zr, Nb, Sn, Ba, Ce, W, Pb y Th -

Recruitment Policy When Firms Observe Workers' Employment Status: an Equilibrium Search Approach

This paper considers an equilibrium search model, where firms use information on a worker's labour market status when recruiting new hires, and all workers search for a job. We show that firms segment their workforce in two. Unemployed workers are offered a lower wage than the workers they recruit from employment in a competing firm even when these workers have the same productivity. The unique equilibrium is given by the Diamond outcome in the market for unemployed workers and the Burdett and Mortensen (B-M) outcome in the market for employed workers. We show that the offer and earnings distributions derived in the model are first order stochastically dominated by the ones given in B-M and all workers are worse off. We also show that in this environment information on employment status is sufficient for firms to obtain the same profits as if they had complete information about workers' reservation wages and outside offers

On the spectroscopy of quantum dots in microcavities

At the occasion of the OECS conference in Madrid, we give a succinct account of some recent predictions in the spectroscopy of a quantum dot in a microcavity that remain to be observed experimentally, sometimes within the reach of the current state of the art.Comment: OECS11 Conference proceedings, in editor style. 4 pages, 1 figure. Animations provided separatel

An islamic Envelope-Flap Binding in the Cloister of Tudela: Another 'Muslim Connection' for Iberian Jews?"

Identifies the book held by the Priests and Scribes in the Temple on a capital in the cloister of Santa María la Mayor in Tudela as an extremely early representation of an Islamic envelope-flap binding, the earliest evidence of such a technique in the northern Iberian peninsula, and interprets its significance for a monastic community in the recently Christianized city of Tudela