A2/O工艺处理焦化废水

本文介绍了采用厌氧-缺氧-好氧生物脱氮工艺(简称A2/O工艺)处理焦化废水的工艺流程及原理,和主要构筑物及运行基本情况,并进行了分析总结。     

基于web2.0的知识共享研究综述

随着知识经济的到来,知识已经成为企业最重要的资产。知识若被共享,双方所获得的资讯和经验都会呈线性增长,不管是在员工层面或是组织层面都需要广泛的知识共享。目前,传统的知识共享系统已经无法满足企业的需求,web2.0的出现给知识共享带来了新的契机。本文对现有的基于web2.0的知识共享的研究进行整理归纳,介绍目前对基于web2.0的知识共享的主要成果。     

SME performance in transition economies: The financial regulation and firm-level corruption nexus

Using a general equilibrium endogenous growth model we explain underperformance in the small and medium enterprise sector as an effect of corruption and non-competitive banking. Limited competition in the banking sector causes a high loan-deposit spread, worsens the initial effect of corruption, and depresses growth. Fostering bank competition, for instance, by allowing foreign bank entry, would be a simple solution to this problem, but frequently, authorities choose to hamper bank competition. Therefore, we explain the persistence of non-competitive banking as a result of governments’ regulatory choice. If the government has a stake in the banking sector there exists a trade-off between current benefits from bank profits and future growth. Firm-level corruption affects intertemporal optimization and distorts the government’s choice towards more restrictive regulation, i.e., less bank competition, even if the deciding institution itself is not corrupt. These results show that the two prominent problems for small and medium enterprises, corruption and finance, are mutually reinforcing.     

Property rights imperfections and asset allocation: Co-ownership in Bulgaria

This paper analyzes how imperfections of property rights affect households’ allocation of assets using micro-survey data from Bulgaria. Co-ownership of assets is widespread in many countries due to inheritance. Central and Eastern Europe offers an interesting natural experiment to assess the effects of this type of property rights imperfection because of the asset restitution process in the 1990s. In Bulgaria, where co-ownership is very prominent and land is strongly fragmented, the land reform and inheritance legislation allows identifying the impact of co-ownership by taking advantage of a discontinuity created by a minimum plot size law. We find that land in co-ownership is more likely to be used by less efficient farm organizations or to be left abandoned, and that it is related to significant welfare losses. The paper hence provides evidence of sub-optimal land allocation following a privatization that established formal but imperfect property rights.     

Exchange rate undervaluation and manufactured exports: A deliberate strategy?

Recent literature suggests that a proactive exchange rate policy in accordance with price incentives (i.e. undervaluation) can foster manufactured exports and growth. This paper is built on these recent developments and investigates, using a sample of 52 developing countries, whether such a proactive exchange rate policy is adopted. The results show that during the period 1991–2005 a number of countries has used undervaluation to foster the price competitiveness of manufactured exports.     

Understanding the economic dynamics behind growth-inequality relationships

In this paper, a dynamic general equilibrium (DGE) model of growth-inequality relationships, with missing credit markets, knowledge spillover and self-employed agents, is calibrated to New Zealand data. The model explains how two distinct policy shocks involving redistribution and immigration imply, subsequently, two completely opposite outcomes. Agents’ inability to borrow aggravates a negative macroeconomic effect of heterogeneity on growth. Redistribution mitigates that effect but creates microeconomic disincentives on saving and work-effort. Consequently, immigration shocks that perturb variance of efficiency induce a negative growth-inequality relationship, while redistribution shocks, in New Zealand’s case, produce larger fluctuations in incentives than in macro benefits, implying a positive growth-inequality relationship.     

Growth effects of environmental policy when pollution affects health

In this paper, we develop a R&D-based growth model with a pollution externality and a health production sector. We study how health-impairing pollution affects long term growth, and the effect of an emissions' reduction policy (tax). We show that a tighter environmental tax has positive effects on growth via two channels. On the one hand, it improves workers' health and, thereby, productivity; on the other hand, it induces a reallocation of resources towards R&D and, thereby, higher research intensity. The size of the growth effect of a tighter environmental tax, and the level of the optimal environmental tax, are both positively correlated with the weight individuals place on health relative to consumption. As for welfare, a tighter environmental tax brings about utility gains in the long run and, potentially, also in the short run.     

Foreign direct investment and China's regional income inequality

China's widening regional income inequality coupled with its pronounced regional disparity in foreign direct investment stock since 1990 has claimed the attention of many scholars. While some researchers confirm regional disparity in China's foreign direct investment, others attribute the widening regional income inequality to this regional disparity. This paper thus assesses the impacts of China's stock of foreign direct investment on its regional income inequality using simultaneous equation model and the Shapley value regression-based decomposition approach. Our results suggest that China's stock of foreign direct investment has accounted for merely 2% of its regional income inequality. Furthermore, the contribution ratio of per capita foreign direct investment stock to China's regional income inequality has relatively been on a steady decline since 2002. The decomposition results also reveal that provincial per capita physical assets account for over 50% of the nation's income inequality and 65% of the increases in income inequality since 1990. The other two important determinants of regional income inequality are province location and educational level. However, educational level is found to have a decreasing effect on regional income inequality.     

Bankruptcy costs, liability dollarization, and vulnerability to sudden stops

Countries with intermediate levels of institutional quality suffer larger output contractions following sudden stops of capital inflows than less developed nations. However, countries with strong institutions seldom experience significant falls in output after capital flow reversals. We reconcile these two observations using a calibrated DSGE model that extends the financial accelerator framework developed in Bernanke, Gertler and Gilchrist (1999). The model captures financial market institutional quality with creditors' ability to recover assets from bankrupt firms. Bankruptcy costs affect vulnerability to sudden stops directly but also indirectly by affecting the degree of liability dollarization. Simulations reveal an inverted U-shaped relationship between bankruptcy costs and the output loss following sudden stops.     

Stochastic convergence of the catch-up rate and multiple structural breaks in Asian countries

Allowing for multiple structural breaks and cross-section dependence, we re-investigate the hypothesis that the catch-up rates stochastically converge for 13 Asian countries from 1960 to 2007. Non-rejection of stationarity provides evidence for stochastic convergence, implying that following shocks to the catch-up rate, it will eventually revert to its long-run level.