How technology teachers understand technological knowledge

Swedish technology teachers’ views of technological knowledge are examined through a written survey and a series of interviews. The study indicates that technology teachers’ understandings of what constitutes technological knowledge and how it is justified vary considerably. The philosophical discussions on the topic are unknown to them. This lack of a proper framework for what constitutes technological knowledge and how it is justified might affect both how curricula are interpreted and how pupils’ knowledge is assessed.     

The missing link: Bringing institutions and politics into energy future studies

Energy future studies can be a useful tool for learning about how to induce and manage technical, economic and policy change related to energy supply and use. The private sector has successfully deployed them for strategic planning, examining key parameters such as markets, competition and consumer trends. However in public policy, most energy future studies remain disconnected from policy making. One reason is that they often ignore the key political and institutional factors that underpin much of the anticipated, wished-for or otherwise explored energy systems developments. Still, we know that institutions and politics are critical enablers or constraints to technical and policy change. This paper examines how analytical insights into political and institutional dynamics can enhance energy future studies. It develops an approach that combines systems-technical change scenarios with political and institutional analysis. Using the example of a backcasting study dealing with the long term low-carbon transformation of a national energy system, it applies two levels of institutional and political analysis; at the level of international regimes and at the level of sectoral policy, and examines how future systems changes and policy paths are conditioned by institutional change processes. It finds that the systematic application of these variables significantly enhances and renders more useful backcasting studies of energy futures.     

Ultra high frequency volatility estimation with dependent microstructure noise

We analyze the impact of time series dependence in market microstructure noise on the properties of estimators of the integrated volatility of an asset price based on data sampled at frequencies high enough for that noise to be a dominant consideration. We show that combining two time scales for that purpose will work even when the noise exhibits time series dependence, analyze in that context a refinement of this approach is based on multiple time scales, and compare empirically our different estimators to the standard realized volatility.     

Vertical externalities in cigarette taxation: Do tax revenues go up in smoke?

In federal systems, where tax bases are joint property, the tax policy of one level of government affects the tax base of the other. This paper examines the interdependence of US federal and state cigarette tax rates. Our results suggest that states may reduce their cigarette tax rate by as much as 48 cents per dollar increase in the federal tax rate. Thus, a federal tax hike may reduce the amount of generated state tax revenues both directly (the overall tax rate rises and the state tax base declines), and indirectly (the state tax rate declines).     

The importance of employer contacts: Evidence based on selection on observables and internal replication

I estimate effects of the labor market training program “Swit” on employment using both register and survey data. Swit was initiated in an attempt to increase the supply of qualified personnel in the IT sector. Based on the register data I find a large positive effect from the Swit on employment as compared to conventional programs directed towards IT. By also using survey information I conclude that the effect was due to increased employer contacts. The result is of interest because of the relatively large effect especially for individuals with traditionally weak positions on the labor market. Furthermore, I methodologically demonstrate how information about the contents of the programs may corroborate findings based on conditional independence assumptions.     

Equilibrium selection in coordination games with simultaneous play

Summary. We apply the dynamic stochastic framework proposed in recent evolutionary literature to a class of coordination games played simultaneously by the entire population. In these games payoffs, and hence best replies, are determined by a summary statistic of the population strategy profile. We demonstrate that with simultaneous play, the equilibrium selection depends crucially on how best responses to the summary statistic remain piece-wise constant. In fact, all the strict Nash equilibria in the underlying stage game can be made stochastically stable depending on how the best response mapping generates piece-wise constant best responses. Received: February 12, 2001; revised version: October 29, 2001     

Natural resources damages from Chernobyl

Conclusion In this note, we have reported a simple attempt to examine the stability over time of willingness-to-pay measures. By running a simple regression equation, we are able to explain why the average willingness to pay fell between two consecutively hunting seasons. The most important explanation is that hunting in the second hunting season was affected by the nuclear radiation accident at Chernobyl. Almost 10 percent of the hunters stated that their willingness to pay was affected due to the fact that their moose meat was contaminated. Since there are 24,000 moose hunters in the county of Västerbotten, we arrive at a yearly loss of about SEK 2 million for the county. Assuming that our figures apply also at the national level, Swedish moose hunters suffered a loss of almost SEK 30 million in the 1986 hunting season. If the same impact on hunters was felt for, say, 3 to 4 years, the present value of the loss caused by the Chernobyl accident could amount to over SEK 100 million (assuming a discount rate of 5 percent). This is a considerable amount, given that Swedish moose hunters constitute only a small fraction of all those who were affected by the Chernobyl accident.     

Knowledge Spillovers in Europe: A Patent Citations Analysis

This paper addresses the pattern of knowledge flows as indicated by patent citations between European regions. Our findings support the hypothesis that there are important barriers to knowledge flows in Europe. Patent citations occur more often between regions which belong to the same country and which are in geographical proximity. Furthermore, patent citations are industry specific and occur most often between regions that are specialised in industrial sectors with specific technological linkages between them. Patent citations are also more frequent when the citing region belongs to the same linguistic group as the cited region.
JEL classification : O 30; O 33; R 19     

Discussion of “inventory policy, accruals quality and information risk”

Krishnan et al. (Review of Accouting Studies, 2008) investigate how the choice of LIFO versus FIFO affects firms’ accruals quality and cost of capital. The authors show that LIFO firms have better accruals quality and lower cost of capital than FIFO firms and that the cost of capital effect associated with the inventory valuation method is not subsumed by differences either in fundamental risk or accruals quality between LIFO and FIFO firms. This discussion is focused on key design choices and underlying assumptions.