A social network supported CAI model for tacit knowledge acquisition

Freehand sketching is one of the most important and commonly used methods of generating and sharing budding ideas during the conceptual development portion of the preliminary phase of design. To develop one’s skills, prolonged practice, acquiring instant feedback and suggestions while practicing are invaluable. The two key and indispensable parts of learning draftsmanship are viewing and commenting on large numbers of free hand sketches. However, due to insufficient educational resources, instructors must spend most of their time engaged in class-room teaching, reducing the time allotted for one-on-one discussion and specialized assistance. Furthermore, the lack of sketch grading criteria can prevent students from developing proper insights into the essentials of sketching. As a result, students neither receive personalized feedback nor acquire adequate training in critiquing freehand sketching skills. These factors decrease learning effectiveness and negatively impact learning motivation. In order to solve this problem, this research has created a discussion platform on Facebook that utilizes the learning characteristics essential to developing proficiency in freehand sketching. It includes practice, observation, and comments. It has been found that this cultivates the subjects’ ability to judge freehand sketch quality and increases learning motivation and effectiveness through the process of peer-assessment. After participating in the one-semester teaching experiment, the abilities of the experimental group were significantly better than those of the control group, demonstrating that the online sketch discussion platform has a significant impact on freehand sketch learning.     

Organising agriculture in the year 2000

How much of the world's potential food production is realised depends on how effectively agriculture is organised. The authors evaluate the effects of alternative agricultural systems on food production, consumption and trade growth rates in the food-deficit, developing countries. The effects of these alternative agricultural systems on production and trade in the rest of the world are also discussed. They conclude with a review of the specific characteristics of the alternative systems and examine the role each is likely to play in organising agriculture in the year 2000.     

An Empirical Evaluation of the CPI Home Purchase Index, 1973–1978

This paper examines the accuracy of the home purchase component of the Consumer Price Index. Alternative monthly index series are simulated over the period 1973–1978 using FHA Master Statistical File data. Hedonic indexes derived from monthly regressions are compared to series constructed by the current CPI index method, which utilizes only age and size of house in correcting for intertemporal quality change. Of particular interest is the BLS practice of "linking out" price changes occurring when FHA raises its ceiling on the size of insurable mortgages. This procedure may have led to a significant downward bias in the official index.     

Portfolio diversification into the Asia-Pacific capital markets: A currency perspective

This paper examines the potential benefits of international investment in the Asia-Pacific capital markets. Using the viewpoints of U.S., Hong Kong and Japanese investors, the study shows that the returns from international investment within the region are more dependent upon the state of exchange rate changes. For the Hong Kong investors, despite the adopted pegged-rate between the Hong Kong dollar and U.S. dollar, the pattern of exchange returns from investing in the region resembles that of Japan rather than that of the U.S.     

Explaining asset pricing puzzles associated with the 1987 market crash

The 1987 market crash was associated with a dramatic and permanent steepening of the implied volatility curve for equity index options, despite minimal changes in aggregate consumption. We explain these events within a general equilibrium framework in which expected endowment growth and economic uncertainty are subject to rare jumps. The arrival of a jump triggers the updating of agents' beliefs about the likelihood of future jumps, which produces a market crash and a permanent shift in option prices. Consumption and dividends remain smooth, and the model is consistent with salient features of individual stock options, equity returns, and interest rates.