Communities of practice as a tool for continuing professional development of technology teachers’ professional knowledge

With the introduction of a new school curriculum in South Africa in 1998, Technology as a school subject was introduced for the first time. Implementation by the National Department of Education took place over a very short time frame allowing very little time for adequate training of technology teachers by the provincial departments of education. Teachers were expected to implement technology in schools without being adequately trained. They needed to develop their professional knowledge which comprises school knowledge, subject knowledge and pedagogical knowledge. This could mainly be done through continuing professional teacher development (CPTD). To address the lack of CPTD opportunities and to develop these teachers’ professional knowledge, the Unit for Technology Education at a university in South Africa established a Community of Practice (CoP) as a strategy to develop teachers’ professional knowledge in Civil Technology. However, after a number of CoP workshops, and although these CoPs have been designed to serve as a tool for CPTD, we do not know to what extent it succeeds in developing teachers’ professional knowledge. The purpose of this article is to determine to what extent the CoP succeeded in developing teachers’ professional knowledge. A qualitative study was conducted. Data were collected through the observation of the teachers during the CoPs, open-ended questionnaires and field notes taken during workshop discussions. The main findings were that the teachers gained discipline knowledge and acquired instructional methodology (pedagogy) from which learners may benefit. The presentation and organisation of the CoP influenced the learning of the teachers.     

Trade costs,quality and the skill premium

We develop a monopolistic competition model with non‐homothetic factor input bundles where increasing quality requires increasing use of skilled workers. As a result more skill abundant countries export higher quality, higher priced goods. Using a multi‐country dataset, we test and confirm the findings in Schott ( 2004 ) of a positive effect of skill abundance on unit values identified with US data. We extend the core model with per unit trade costs leading to the Washington apples effect that goods shipped over larger distance are of higher quality. The combination of high‐quality goods being relatively skill intensive with the Washington apples effect implies that countries at a larger distance from their trading partners display a higher skill premium. Simulating our model, we find that a doubling of distance of a country relative to all its trading partners raises the skill premium in a country by about 1.6%.     

Auctions vs. Bookbuilding and the Control of Underpricing in Hot IPO Markets

Market returns before the offer price is set affect the amountand variability of initial public offering (IPO) underpricing.Thus an important question is "What IPO procedure is best adaptedfor controlling underpricing in "hot" versus "cold" market conditions?"The French stock market offers a unique arena for empiricalresearch on this topic, since three substantially differentissuing mechanisms (auctions, bookbuilding, and fixed price)are used there. Using 1992–1998 data, we find that theauction mechanism is associated with less underpricing and lowervariance of underpricing. We show that the auction procedure'sability to incorporate more information from recent market conditionsinto the IPO price is an important reason.     

Insights from Transaction Cost Economics for Government Organizations: An Application to the U.S. Department of Defense (DoD)

Atlantic Economic Journal -     

Sector and importer determinants of prices for traded intermediates

While the literature on traded goods prices emphasizes final goods prices and related consumer theory to explain variation in goods prices with importer characteristics, trade in intermediates actually constitutes about two thirds of total trade. We propose a mechanism for explaining variations in the prices of intermediates as a function of importer characteristics, wherein production is vulnerable to failure and the probability of failure declines in the quality of intermediates. Higher wages mean a greater opportunity cost of failure, leading to a stronger demand for high-quality intermediates where firms face higher wages. We find empirical support for this mechanism in the case of intermediate goods using IV regressions. In addition, our findings indicate that while the cost of labour explains about one fifth of variation in imported intermediate prices, it is a non-significant determinant of imported final goods prices.     

Market power in distribution and pass‐through for consumers and producers

We examine the differential pass‐through of import prices into consumer and producer prices. We develop a framework with distribution costs and distribution market power. We then examine pass‐through from import prices to consumer and producer prices in the euro area using the U.S. import price as instrument. We find that pass‐through rates to producer prices are more sensitive to changes in distribution margins than pass‐through to consumer prices. Furthermore, only a portion of import price changes translate into domestic price changes limiting potential consumer benefits from tariff liberalization, with market power in distribution services being one important factor reducing pass‐through.     

Market Segmentation Research: Beyond Within and Across Group Differences

Market segmentation research is currently focused too narrowly on the task of segment identification as opposed to its strategic relevance within a firm. In this paper we distinguish an ex ante approach to market segmentation research, which begins with studying the motivating conditions that lead people to the tasks and interests in their lives, from an ex post approach which begins with an individual's reaction to marketplace offerings. We argue that the marketing task of guiding managements to make what people will want to buy will be more successful in light of a deep understanding of behavior in the context of everyday life and work, rather than a detailed understanding of preferences in the marketplace. Directions for future research are discussed.     

Bilateral Exchange Rates and Jobs

We study the labor market effects of realignment in fixed bilateral exchange rates, such as China's peg to the US dollar. We employ the open economy model by de Melo and Robinson to identify the core parameters of the real, trade side of the economy driving the unemployment effects of bilateral exchange rate realignment. A small open economy version of the model is explored analytically and a large multicountry version numerically. Analytics in the small open economy model show that unemployment effects of adjusting of a bilateral peg hinge on the fraction exported to and imported from the trading partner. A larger fraction exported to and a smaller fraction imported from the trading partner make it more likely that revaluation of a trading partner's currency has beneficial effects. Numerics in the large economy model show that Chinese revaluation can generate both positive and negative unemployment effects depending upon underlying parameter values. Adverse unemployment effects can go along with an improving trade balance.