abstract research and development (r&d;) spending plays a major role in innovation, raising productivity and increasing economic growth. the purpose of this paper is to investigate the impact of r&d; spending on growth and total factor productivity (tfp) in iran's agricultural sector. we estimate growth and productivity models using auto-regressive distributed lag (ardl) approach and data over ...

Almost all Unani physicians have advocated Nutool therapy in the management of migraine (Shaqiqa), particularly with or without medicated oil liquid, but unfortunately these not evaluated on scientific parameters. Despite fact that, this is practice physician and a large number patients been treated successfully; regimen still requires validation to generalize their popularity acceptability. Pr...

a r t i c l e i n f o JEL classification: C14 C22 C58 G10 G15 E44 Keywords: MIDAS Conditional variance China In order to shed new light on the influence of volume and economic fundamentals on the long-run volatility of the Chinese stock market we follow the methodology introduced by Engle et al. (2009) and Engle and Rangel (2008) to account for the effects of macro fundamentals, and augment it ...

In this paper I show that corruption can attenuate the adverse effects of customs-related red tape on firm exports. I first develop a model where exporters use bribes to encourage customs officials to process their documents in an expedited manner. This lowers the delay that they face at customs. The model shows that if the value of the reduced delays is greater than the bribe payment itself, t...

The objective of the paper is to explore and give an overview of two central policy alternatives to improve the integration between the European Union and developing countries by removing barriers to trade: trade preferences and trade facilitation. After reviewing the relevant literatures and discussing the issues which constitute problems or opportunities for practitioners and researchers in b...

Avian malaria caused by Plasmodium gallinaceum is an important mosquito-borne disease. Eradication of this disease remains problematic since its competent vectors are diverse and widely distributed across the globe. Several mosquito species were implicated as competent vectors for this parasite. However, studies on vector competence for P. gallinaceum remain limited. In this study, vector compe...

JEL CLASSIFICATION C26, C99, D03, I18. PSYCINFO CLASSIFICATION 2360; 3920.

Using quantile regression and a rich cross section data set for German manufacturing plants this paper documents that the impact of plant characteristics on export activities varies along the conditional size distribution of the export/sales ratio. For example, firm size is statistically significant at a conventional level for the 0.25 quantile only; branch plant status matters at the upper tai...

This paper introduces service innovation in the proximity-concentration trade-off model of trade and FDI (Helpman, Melitz and Yeaple, 2004). The idea is that innovation will have two main effects on service firms’ choice between exports and FDI. First, innovative firms will on average have higher productivity levels than non-innovative enterprises. Secondly, innovators will have to pay a higher...

In pre-industrial Europe, growth was driven by the expansion of trade, and the expansion of trade was driven by falling trading costs. This paper discusses the mechanisms linking these processes–profit-seeking behavior by merchants, changes in the organization of production, technological progress, and urbanization. It then reviews the fluctuations in European economic growth between 1000 and 1...