International Trade and Growth: An Overview Using the New Growth Theory

An overview of the new growth theory is provided from both an analytical and empirical perspective. Following a historical outline and a brief analytical sketch of the R&D-based models, the results from fitting two structural models to data are presented. Results show the relative impacts on growth from trade and R&D-based policies including technological spillovers from trade. The mechanism of intersectoral adjustments to the long-run growth path is also discussed. Insights provided by the theory are related to agriculture from the view of agriculture in the context of the broader economy within which it must compete for resources, and in terms of growth in agricultural factor productivity as evidenced by the recent growth in genetic engineering.     

Information acquisition,foreign bank entry,and credit allocation

This paper presents a theoretical framework to understand the impact of foreign bank entry on the access to and the price of credit for different types of firms. A major point of departure from the previous literature is that incumbents’ information about firms is endogenous in the model; previous screenings and lending relations of incumbents determine which type(s) of firms they can identify. I show that incumbents’ information is negatively correlated with the quality of borrowers. Moreover, although a priori entrants have a comparative advantage in lending to transparent firms, previous lending relations of incumbents might reverse this relation. In particular, given that transparent firms are the only type screened before the entry and therefore they are the only type distinguishable by incumbents, entrants might have a comparative advantage in lending to opaque firms. The analysis provides new insights into the inconclusive evidence of the literature regarding entrants’ credit allocation.     

土地利用环境影响评价指标体系研究--以新疆策勒绿洲为例

利用地学遥感信息定性、定量分析和统计分析相结合的方法,研究半个世纪以来塔里木盆地南部策勒绿洲的土地利用变化,探讨绿洲荒漠这一矛盾体之间的相互转化的动态时空过程、特征和机制,这是保护干旱区生态环境、促进绿洲经济与环境协调发展的重要举措.针对干旱区土地利用变化对环境影响定量研究指标体系与研究方法中优化模型所涉及到的关于地学遥感、自然资源、社会经济、环境指标体系进行深入分析,并给出了基本的量化研究方法.     

An elementary proposition on technical progress and non-traded goods

We explore the effect of technical progress on the endogenously determined range of non-traded goods by using a Ricardian model with continuum of goods. By defining technical progress on the basis of proportional changes in the relative productivity across sectors, we show that the range of non-traded goods decreases if technical progress is unbiased or if it is biased toward the goods that a country has more comparative advantage.     

Groundwater balance and conservation under different water pricing and agricultural policy scenarios: A case study of the Hamadan-Bahar plain

Government subsidies for agricultural activities in recent decades have encouraged farmers of Hamadan-Bahar plain to extend the number of wells and irrigated farms, with no consideration of groundwater resource conservation. As a result, the level of the groundwater table has decreased continuously in this area, threatening the life of groundwater aquifer. The objective of the study is to analyze the impacts of irrigation water pricing and agricultural policy scenarios on aquifer conservation by considering the dynamic relations between aquifer groundwater balance and the agriculture sector. For this purpose a combination of simulation and optimization techniques is considered in a dynamic framework. Firstly, dynamic treatments of groundwater and the main factors affecting the balance of studied aquifer are simulated. Then, optimization behaviour of agriculture sector related to farmers' decision-making processes is defined on the time horizon. Thereafter all of the equations are used simultaneously by a non-linear dynamic programming method, which maximize present value of gross margins of agriculture sector subject to groundwater constrains and other input limitations. The analysis of the results indicates that water pricing by itself can considerably reduce the agricultural demand for aquifer groundwater in the Hamadan-Bahar plain.     

Tariff and Consumption Tax Reforms in a Developing Tourism Economy

This paper examines the effects of a coordinated tax reform by replacing import tariffs with point-by-point increases in consumption taxes for a small-open developing tourism economy. Foreign tourists demand for the non-traded goods provided in the informal sector of the host economy, resulting in a tourism-induced terms-of-trade effect. The presence of inbound tourism lends a support to positive tariffs even for a small open economy. The indirect tax reform of this kind can increase residents’ welfare and government revenue when the initial tariffs are relatively larger to the consumption taxes.     

Does globalization weaken labor unions in developing countries?

For a developing economy with a given urban wage rate, globalization in capital markets strengthens labor unions. This result hinges on the fixed urban wage rate, which leads to a constant capital–labor ratio in the urban sector. Globalization via capital inflows not only enhances the employment effect of unionization but also reduces the rent-shifting related loss in production inefficiency to domestic capital, lending a support to labor unions for developing economies. This result is contrary to the common belief that labor unions tend to be weakened during the globalization process observed after 1980s in many developed economies.     

Scheduling of re-entrant flow shops

We propose and develop a scheduling system for a very special type of flow shop. This flow shop processes a variety of jobs that are identical from a processing point of view. All jobs have the same routing over the facilities of the shop and require the same amount of processing time at each facility. Individual jobs, though, may differ since they may have different tasks performed upon them at a particular facility. Examples of such shops are flexible machining systems and integrated circuit fabrication processes. In a flexible machining system, all jobs may have the same routing over the facilities, but the actual tasks performed may differ; for instance, a drilling operation may vary in the placement or size of the holes. Similarly, for integrated circuit manufacturing, although all jobs may follow the same routing, the jobs will be differentiated at the photolithographic operations. The photolitho-graphic process establishes patterns upon the silicon wafers where the patterns differ according to the mask that is used.The flow shop that we consider has another important feature, namely the job routing is such that a job may return one or more times to any facility. We say that when a job returns to a facility it reenters the flow at that facility, and consequently we call the shop a re-entrant flow shop. In integrated circuit manufacturing, a particular integrated circuit will return several times to the photolithographic process in order to place several layers of patterns on the wafer. Similarly, in a flexible machining system, a job may have to return to a particular station several times for additional metal-cutting operations.These re-entrant flow shops are usually operated and scheduled as general job shops, ignoring the inherent structure of the shop flow. Viewing such shops as job shops means using myopic scheduling rules to sequence jobs at each facility and usually requires large queues of work-in-process inventory in order to maintain high facility utilization, but at the expense of long throughput times.In this paper we develop a cyclic scheduling method that takes advantage of the flow character of the process. The cycle period is the inverse of the desired production rate (jobs per day). The cyclic schedule is predicated upon the requirement that during each cycle the shop should perform all of the tasks required to complete a job, although possibly on different jobs. In other words, during a cycle period we require each facility to do each task assigned to it exactly once. With this requirement, a cyclic schedule is just the sequencing and timing on each facility of all of the tasks that that facility must perform during each cycle period. This cyclic schedule is to be repeated by each facility each cycle period. The determination of the best cyclic schedule is a very difficult combinatorial optimization problem that we cannot solve optimally for actual operations. Rather, we present a computerized heuristic procedure that seems very effective at producing good schedules. We have found that the throughput time of these schedules is much less than that achievable with myopic sequencing rules as used in a job shop. We are attempting to implement the scheduling system at an integrated circuit fabrication facility.