Search results for "model [interaction]"
showing 10 items of 1495 documents
Earth System Chemistry integrated Modelling (ESCiMo) with the Modular Earth Submodel System (MESSy) version 2.51
2016
Abstract. Three types of reference simulations, as recommended by the Chemistry–Climate Model Initiative (CCMI), have been performed with version 2.51 of the European Centre for Medium-Range Weather Forecasts – Hamburg (ECHAM)/Modular Earth Submodel System (MESSy) Atmospheric Chemistry (EMAC) model: hindcast simulations (1950–2011), hindcast simulations with specified dynamics (1979–2013), i.e. nudged towards ERA-Interim reanalysis data, and combined hindcast and projection simulations (1950–2100). The manuscript summarizes the updates of the model system and details the different model set-ups used, including the on-line calculated diagnostics. Simulations have been performed with two diff…
The importance of the Logistics Performance Index in international trade
2014
Logistics and transport increasingly play a pivotal role in international trade relations. The Logistics Performance Index (LPI) analyses differences between countries in terms of customs procedures, logistics costs and the quality of the infrastructure for overland and maritime transport. The aim of this article is to analyse the impact that each of these components has on trade in emerging economies using a gravity model. Furthermore, the study also attempts to detect possible advances in logistics in developing countries, which are grouped into five regions (Africa, South America, Far East, Middle East and Eastern Europe) by comparing the first LPI data published in 2007 with the most re…
Global distributions of diazotrophs abundance, biomass and nitrogen fixation rates - Gridded data product (NetCDF) - Contribution to the MAREDAT Worl…
2012
The MAREDAT atlas covers 11 types of plankton, ranging in size from bacteria to jellyfish. Together, these plankton groups determine the health and productivity of the global ocean and play a vital role in the global carbon cycle. Working within a uniform and consistent spatial and depth grid (map) of the global ocean, the researchers compiled thousands and tens of thousands of data points to identify regions of plankton abundance and scarcity as well as areas of data abundance and scarcity. At many of the grid points, the MAREDAT team accomplished the difficult conversion from abundance (numbers of organisms) to biomass (carbon mass of organisms). The MAREDAT atlas provides an unprecedente…
EMU and trade: A PPML re‐assessment with intra‐national trade flows
2020
This paper examines the EMU effect on trade for the eleven early joiners and Greece relying for the first time on data that include both international and intra‐national trade flows, in line with all the microfoundations of the structural gravity model of trade. We find that the overall EMU impact on trade is positive between its members and, specially, for trade between members and non‐members. Interestingly, we further show that the effect of the EMU on bilateral trade remarkably differs across countries. For Ireland, Belgium–Luxembourg, Spain, Portugal and Austria, we find robust evidence that EMU has boosted trade both with other members and with third countries, while for Finland, Fran…
Regression with imputed covariates: A generalized missing-indicator approach
2011
A common problem in applied regression analysis is that covariate values may be missing for some observations but imputed values may be available. This situation generates a trade-off between bias and precision: the complete cases are often disarmingly few, but replacing the missing observations with the imputed values to gain precision may lead to bias. In this paper, we formalize this trade-off by showing that one can augment the regression model with a set of auxiliary variables so as to obtain, under weak assumptions about the imputations, the same unbiased estimator of the parameters of interest as complete-case analysis. Given this augmented model, the bias-precision trade-off may the…
TERRORISM AND INTERNATIONAL TOURISM: NEW EVIDENCE
2008
This paper analyses the impact of terrorist activity on international tourist flows. To this end, we have estimated a cross‐sectional gravity equation for tourism from the G‐7 countries to a sample of 134 destinations over the period 2001–2003. Within this framework, we evaluate the deviation from ‘normal’ tourist flows due to terrorist activity, which is considered as negative advertising for the affected country. The analysis suggests that both domestic victims and international attacks are relevant factors when foreign tourists make their choice. This result is robust under alternative specifications. Moreover, the impact of terrorism is more severe in developing countries. The author is…
Trade Costs, Trade Balances, and Current Accounts: an application of Gravity to Multilateral Trade
2005
In this paper we test the well-known hypothesis of Obstfeld and Rogoff (NBER Macroeconomics Annual 7777:339–390, 2000) that trade costs are the key to explaining the so-called Feldstein–Horioka puzzle. Our approach has a number of novel features. First, we focus on the interrelationship between trade costs, the trade account and the Feldstein–Horioka puzzle. Second, we use the gravity model to estimate the effect of trade costs on bilateral trade and, third, we show how bilateral trade can be used to draw inferences about desired trade balances and desired intertemporal trade. Our econometric results provide strong support for the Obstfeld and Rogoff hypothesis and we are also able to recon…
Competitiveness and interregional as well as international trade: The case of Catalonia
2010
Recent years have seen a surge of interest among industrial organization economists in using data on international trade flows as windows into competitiveness. For countries that are at least mid sized (e g., Spain), interregional trade tends to be as large as or significantly larger than international trade. The case of Catalonia, a Spanish region, illustrates how ignoring interregional flows can lead to erroneous inferences about a region's external competitiveness. Accounting for Catalonia's interregional as well as international flows shifts what is generally assessed to be a chronic trade deficit in goods into a surplus and changes diagnoses of which Catalan sectors generate external s…
Development of capabilities from the innovation of the perspective of poverty and disability
2017
Abstract Poverty is a reality that is present to a greater or lesser extent in all regions of the world. Disability, like poverty, is also a reality in the society in which we live. Disability is not only a reality, but an inescapable truth, as at some point in life all people will be vulnerable and will exhibit some form of disability. When combined, poverty and disability immerse a person in more serious circumstances. Within the concept of poverty, disability means greater poverty. Based on a correct conceptualization of what poverty and disability are, this paper aims at proposing an innovative model of accompaniment, one which starts from a complete and multidimensional vision of reali…
Trade effects of monetary agreements: Evidence for OECD countries
2008
Abstract This paper analyses the effects of monetary agreements on trade flows using a sample of 25 OECD countries over the period 1950–2004. We find that these agreements have boosted intra-bloc trade. This result especially applies to the case of the euro. More importantly, in contrast to regional trade agreements, all monetary agreements analysed show evidence of trade-creating effects with third countries. Finally, only the euro shows a symmetric impact for the trade-creating effect with non-members, that is, using the euro promotes both the Eurozone's exports and its imports to non-Eurozone markets to a similar extent.