Heterogeneous Jobs and the Aggregate Labour Market

This paper analyses a simple search‐and‐matching model with heterogeneous jobs. First, I derive an explicit formula that ensures the social efficiency of the equilibrium outcome. This formula generalises the well‐known Hosios condition and clarifies the role of externalities across labour markets for different types of jobs. Second, business cycle fluctuations with heterogeneous jobs are analysed. Heterogeneity in productivity and job stability plays an important role in generating strong labour‐market responses to productivity shocks.     

Diffusion and Innovation of New Technologies under Skill Heterogeneity

This article presents a model of innovation and diffusion of machines which embody a new technology. Users of the machines are heterogenous in their skill level. Skilled machine-users adopt new machines first, while unskilled users wait until machines become more user-friendly and reliable. The improvement of machines is the engine of diffusion, and it is carried out by the monopolist machine producer. The speed of diffusion is affected by the skill distribution in the economy. At any point in time, the machine producer can innovate a new generation of machines. The timing of innovation is also influenced by the skill distribution.     

Asset prices in a Huggett economy

This paper explores asset pricing in economies where there is no direct insurance against idiosyncratic risks but other assets can be used for self-insurance, subject to exogenously-imposed borrowing limits. We analyze an endowment economy, based on Huggett (1993) [11], both with and without aggregate risk. Our main innovation is that we obtain full analytical tractability by studying the case with “maximally tight” borrowing constraints. We illustrate by looking at riskless bonds, equity, and the term structure of interest rates, and we show that the model can reproduce many features of observed asset prices when idiosyncratic risks are quantitatively reasonable.     

Spam mails impede economic growth

We estimate labor losses caused by spam mails and input these estimated values into a production function, while also estimating damage to the Gross Domestic Product (GDP) in Japan. As a result, we have found that spam mails decreased the Japanese GDP by about 500 billion yen in 2004. This marginal negative effect of spam mail to the GDP increased with the progress of broadband in 2000. Moreover, from the result of a social simulation conducted by the authors, the amount of damage is projected to reach 1% of the Japanese GDP by 2010, unless adequate countermeasures are taken against spam mails. This projection provides a statistical fundamental to several theoretical analyses of spam mails.     

Farmers and Middlemen in a Transmigration Area in Indonesia 1

Compared with long-settled lava, transmigration areas in the outer islands of Indonesia are characterised by an underdeveloped transportation and communication infrastructure that makes farmers' access to markets relatively difficult. In this case study, however, no significant difference was found in either marketing margins or middleman profits between a transmigration area in Sumatra and a long-settled area m West Java. High risk and transaction costs, associated with long-distance trade under poor infrastructure, together with delays in the issue of formal land titles to transmigrant settlers, operate as entry barriers to marketing activities. These negative factors in the transmigation area are largely compensated for by the larger marketable agricultural surplus per farm, which has the effect of reducing transportation and transaction costs.     

The impacts of robotization on macro and sectoral economies within a world econometric model

A world model of industry and trade is developed to evaluate the probable global impact of robotization on the macro and sectoral economies. It is found that robotization in Japan and Korea has a positive impact on their economic growth, whereas robotization in the United States apparently has a negative impact on economic growth. It is also found that the international impacts of robotization in Japan are negative for the United States, but positive for the Korean economy.     

Japanese Investment in Indonesia: Problems and Prospects

The majority of Japanese investment in Indonesia is import-substitution orientated and located primarily in manufacturing. Declining Japanese investment in recent years is attributable partly to economic factors such as the drop in the price of oil and the higher cost of imports resulting from the devaluation of March 1983 But it is also due to Indonesian government policy. The author suggests a number of ways in which the Indonesian government could establish conditions more favourable to foreign investment.     

拉锯战：2009年亚洲经济展望

虽然亚洲仍然很容易受到全球衰退及金融危机的影响，但其经济基本面还是要好于其他地区。假以时日，亚洲必定会因大宗商品价格下跌而受惠。最重要的是，亚洲决策者有采取颇具扩张性的货币及财政政策的意图和空间。不过政策响应需要一些时间才能发挥效用，而经济的负反馈循环已在形成。在第二轮经济效应（如失业增加、不良贷款上升及存货堆积）的制肘下，