Search results for "Econometric"

Book Review: The Politics of Multiple Belonging: Ethnicity and Nationalism in Europe and East Asia

2006

Comparing the performance of autocracies: issues in measuring types of autocratic regimes and performance

2013

This paper discusses two methodological issues in research studying the performance of political regimes. First, it compares the conceptualisation and measurement of three data sets on types of autocratic regimes developed by Geddes et al. (2012a), Hadenius et al. (2012), and Cheibub et al. (2010). The data sets are found to differ with respect to their conceptualisation of autocratic regimes (narrow vs. flexible concepts) and types of autocratic regimes (criteria for classification, number of autocratic regime types and definition of the main types), as well as their levels of measurement (simple vs. complex indicators). As a result, the choice of data sets matters for this type of researc…

Spatial effects in housing price models : do housing prices capitalize urban development policies in the agglomeration of Dijon (1999) ?

2004

In this article we suppose that the integration of accessibility and neighborhood variables in hedonic housing models doesn't allow to take into account the spatial effects between the housing prices. Using a sample of 1520 transactions of apartments in the urban area of Dijon, we focus on two types of location variables : the distance to the CBD and the distance to several Disadvantaged Districts located in peripheral areas. We detect the presence of a spatial error autocorrelation in the hedonic model indicating that the valuation of the price of an apartment is locally influenced by the prices of the neighboring apartments. Then, we estimate a spatial error model which shows that the loc…

Microalgal oil production for use in rice farms in Albufera (València) region

2013

In the Albufera (Valencia) region of Spain, rice has been farmed for nearly 500 years. Post-harvest flooding of rice fields has become an integral element of wetland refuge for migratory birds. The steady rise in the cost of purchased inputs is causing considerable economic stress to the viability of rice farming in this region. In 2011, it has been estimated the cost of purchased diesel accounted for about 15% of the gross revenue from grain sales. Setting aside about 1.6% of the 14,350-hectare paddy fields for the dedicated yearround cultivation of oleaginous microalgae appears to be sufficient for the entire annual need of diesel fuel. The isolated crude microalgal oil could be used dire…

Measuring the wastewater treatment plants productivity change: Comparison of the Luenberger and Luenberger-Hicks-Moorsteen Productivity Indicators

2019

Abstract It is essential to assess the productivity of wastewater treatment plants (WWTPs) to improve their economic and technical performance over time. In doing so, reliable indexes should be used to avoid biased conclusions leading to unsuccessful policy and managerial measures. Ratio-based indexes are typically employed, but are infeasible when any of the variables are equal or close to zero. To overcome this limitation, this paper presents the innovative approach of applying and comparing two difference-based productivity indicators, Luenberger (LPI) and Luenberger-Hicks-Moorsteen (LHMPI), to evaluate how productivity changes in a sample of WWTPs. Because the LHMPI is an additively com…

Improving the prediction of air pollution peak episodes generated by urban transport networks

2016

Abstract This paper illustrates the early results of ongoing research developing novel methods to analyse and simulate the relationship between trasport-related air pollutant concentrations and easily accessible explanatory variables. The final scope is to integrate the new models in traditional traffic management support systems for a sustainable mobility of road vehicles in urban areas. This first stage concerns the relationship between the hourly mean concentration of nitrogen dioxide (NO2) and explanatory factors reflecting the NO2 mean level one hour back, along with traffic and weather conditions. Particular attention is given to the prediction of pollution peaks, defined as exceedanc…

An infinite-horizon model of dynamic membership of international environmental agreements

2007

Abstract Much of the literature on international environmental agreements (IEAs) uses static models, although most important transboundary pollution problems involve stock pollutants. The few papers that study IEAs using models of stock pollutants do not allow for the possibility that membership of the IEA may change endogenously over time. In this paper we analyse a simple infinite-horizon version of the static model of self-enforcing IEAs, in which damage costs increase with the stock of pollution, and countries decide each period whether to join an IEA. Using a quadratic approximation of the value function of the representative country we show that there exists a steady-state stock of po…

A note on cooperative versus non-cooperative strategies in international pollution control

2002

Abstract In this note, we evaluate the scope of Dockner and Long’s [Journal of Environment Economics and Management 24 (1993) 13] conclusion on the efficiency of the non-cooperative outcome in a differential game of international pollution control. We also complete the study of the different equilibria the differential game can present. Our results show that their conclusion requires that the initial value of the stock of pollution be higher than the Pareto-efficient pollution stock so that the equilibrium path of emissions involves a decreasing stock of pollution. Our results also show that the application of the procedure proposed by Tsutsui and Mino [Journal of Economic Theory 52 (1990) …

Las bodegas cooperativas y la comercialización del vino en España durante el siglo XX

2020

Resumen Las bodegas cooperativas surgieron con un doble objetivo: la elaboracion en comun del vino, para reducir los costes de produccion y aumentar la calidad del producto; y la venta en comun del vino, con una reduccion de los intermediarios y una mejora de la posicion de los viticultores en el proceso de comercializacion. Ambos objetivos tenian que suponer una mayor remuneracion del producto y, en consecuencia, del ingreso de los productores, que en el sector vitivinicola eran fundamentalmente pequenos agricultores familiares, enfrentados a un contexto de caida tendencial de los precios del vino. En este articulo realizamos una primera aproximacion al papel de las bodegas cooperativas en…

The Impact of Population Ageing and Social Stratification: The Case of Latvia

2019

Population ageing and social stratification is widely assumed to have detrimental effects on the economy yet there is little empirical evidence about the magnitude of its effects. The aim of this article is to investigate the relationships between population ageing and social stratification and the state of economy of a small and post-transition economy. We are looking for these relationships and their strength of influence; at what time after shocking these variables reach their original levels. We apply standard Granger (non-) causality tests, VAR (Vector Auto-Regressive), IRF (Impulse Response Function) and the prediction error variance analysis by using quarterly data from 2000 to 2018.…