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1.
Summary In this paper we consider a class of time discrete intertemporal optimization models in one dimension. We present a technique to construct intertemporal optimization models with nonconcave objective functions, such that the optimal policy function coincides with any pre-specifiedC
2 function. Our result is a variant of the approach presented in a seminal paper by Boldrin and Montrucchio (1986). Whereas they solved the inverse problem for the reduced form models, we address the different question of how to construct both reduced and primitive form models. Using our technique one can guarantee required qualitative properties not only in reduced, but also in primitive form. The fact that our constructed model has a single valued and continuous optimal policy is very important as, in general, nonconcave problems yield set valued optimal policy correspondences which are typically hard to analyze. To illustrate our constructive approach we apply it to a simple nonconcave model.We are grateful for the helpful comments of L. Montrucchio, K. Nishimura, T. Mitra and an anonymous referee. Financial support of the Austrian Science Foundation under contract No. P7783-PHY and No. J01003-SOZ is gratefully acknowledged. This paper was written while M. Kopel was visiting the Department of Economics, Cornell University. 相似文献
2.
Engelbert J. Dockner Gustav Feichtinger Alexander Mehlmann 《Journal of Evolutionary Economics》1993,3(2):145-152
We consider a differential game of R&D competition and explore the impact of rivalry on the firms' investment behavior over time. Using closed-loop strategies and hence allowing for strategic interactions among rival firms we show that R&D spending by the individual competitor is increased due to competition in the race for priority. This leads us to argue that competitive encounters enhance R&D activities at the same time as increasing efficiency in the race for a technological breakthrough. 相似文献
3.
Christoph M. Schmidt Achim Wambach Gustav A. Horn Thiess Büttner Uwe Schneidewind 《Wirtschaftsdienst》2017,97(11):763-779
Even though Germany’s economy is currently going strong, the country still faces enormous challenges if it wants to maintain and increase this prosperity. The new government should take this opportunity to set the course for the future by encouraging the digitalisation of the economy and the society as well as by ensuring that the ongoing energy transition is sustainable and efficient. Other challenges include the adverse effects of globalisation on parts of society and the uneven distribution of income and wealth. But the actual magnitude of the government’s room to manoeuver is up for debate. The new government’s fiscal space might be more limited than it seems, since an automatic adjustment of the income tax to inflation and growth is required to end the bracket creep. Given that transfer programmes are being phased out, the federal income tax surcharge to finance German unification also needs to be abolished. Further budget pressure stems from the pension system and from demands by state and local as well as European governments. The new German government should use the next governing period to initiate fundamental reforms of economic and fiscal policy that will provide adequate answers to long-run challenges. 相似文献
4.
Robert J. Myers Roley R. Piggott William G. Tomek 《The Australian journal of agricultural and resource economics》1990,34(3):242-262
Vector autoregression (VAR) methods are used to analyse the contribution of supply, demand and policy shocks to unpredictable fluctuations in the market for Australian wool. VAR procedures are compared with conventional structural econometric models as methods for decomposing sources of instability. While each has advantages and disadvantages, VAR procedures might be viewed as preferable when the underlying market structure is complex and uncertain, as it is in the case of wool. Based on the results obtained, demand shocks are the dominant source of uncertainty in the wool market in the absence of Australian Wool Corporation intervention, but intervention has blunted their effects, reducing market uncertainty and increasing the average level of prices and revenues. 相似文献
5.
Jonathan P. Caulkins Gustav FeichtingerDieter Grass Richard F. HartlPeter M. Kort 《Journal of Economic Dynamics and Control》2011,35(4):462-478
The paper considers the problem of a firm that, while producing a standard product, has the option to introduce an innovative product. The innovative product competes with the standard product and will therefore reduce revenues of the standard product. A distinction is made between innovative products that do or do not become even more relatively appealing as their market share grows (e.g., because of network externalities). It is shown that in the former case, which we call a “disruptive” good, history dependent long run equilibria can occur, which are in line with recent real life economic examples. 相似文献
6.
J.R. Brent Ritchie Gustav Donald Jud Charles I. Zinser Karen A. Conner L. Dale Cruse Enoch F. Bell 《Leisure Sciences: An Interdisciplinary Journal》2013,35(3-4):315-378
Tourism Marketing. By Salah Wahab, Jack Crampon, and L. Rothfield. London, England: Tourism International, 1976. 273 pp. U.S. $16.00 Tourism in the Bahamas and Bermuda: Two Case Studies. By Brian H. Archer. Bangor, Wales: University of Wales Press, 1977. Pp. ix, 87. £3.25 Park Planning Handbook: Fundamentals of Physical Planning for Parks and Recreation Areas. By Monty L. Christiansen. New York: John Wiley & Sons, Inc., 1977. Pp. xiv, 413. Hardcover: $18.95 Educating for Leisure‐Centered Living. By Charles K. Bright‐bill and Tony A. Mobley. (2nd Edition—Revised). New York: John Wiley and Sons, 1977. Pp. viii, 128. Paperback: $4.95 Private and Commercial Recreation: A Text and Reference. By Arlin F. Epperson. New York: John Wiley & Sons Publishing Company, Inc., 1977. Pp. 385. Hardcover: $15.95 The Economic Impact of Parks. A report prepared for the Federal/Provincial Parks Conference. By the Canadian Outdoor Recreation Research Committee. Toronto: Ontario Research Council on Leisure, 1975. Pp. 107. $4.50 A Model for Planning and Managing National Parks. By Laurence Prosser. Center of Leisure Studies, University of Oregon, 1977. Pp. 456. $25.00 Delivery of Community Leisure Services: An Holistic Approach. By James F. Murphy and Dennis R. Howard. Philadelphia: Lea & Febiger, 1977. Pp. vii, 219. Paperback: $9.75 Recreation Leadership. 3rd edition. By Maryhelen Vannier. Philadelphia: Lea & Febiger, 1977. Pp. 387. Hardcover: $12.50 Leisure: An Introduction. Edited by Hilmi Ibrahim and Fred Martin. Los Alamitos: Hwong Publishing Company, 1977. Pp. 360 Outdoor Recreation in America: Trends, Problems and Opportunities. 3rd edition. By Clayne R. Jensen. Minneapolis: Burgess Publishing Company, 1977. Pp. 269. Hardcover: $12.95 A Research Study into Provision for Recreation in the Highlands and Islands: Phase 1—Areas Affected by Oil‐Related Development. Research Reports 22, 23, and 31. Tourism and Recreation Research Unit, University of Edinburgh, Scotland, 1976 and 1977. Pp. 339, 411, and 145. Research Study into Provision for Recreation in the Highlands and Islands: Phase 2—Regional Perspective: A Commentary by J. A. Long, J. T. Coppock, and B. S. Duffield. Research Report 37. Tourism and Recreation Research Unit, University of Edinburgh, Scotland, 1978. 110 pp. The Environmental Impact of Outdoor Recreation. By Geoffrey Wall and Cynthia Wright. Waterloo, Ontario, Canada: Department of Geography Publication Series, Faculty of Environmental Studies. 1977, 69 pp. $5.00. Avocational Counseling Manual—A Complete Guide to Leisure Guidance. By Robert Overs, Sharon Taylor, and Catherine Adkins. Washington, D.C.: Hawkins and Associates, Inc., 1977, 203 pp. Leisure and Recreation: Introduction and Overview. By Clayne R. Jensen. Philadelphia: Lea & Febiger, 1977, 295 pp. Paperback $13.50. The Joy of Sport. By Michael Novak. New York: Basic Books, 1976. Pp. 358. $10.95 相似文献
7.
William A. Brock Gustav Engström Dieter Grass Anastasios Xepapadeas 《Journal of Economic Dynamics and Control》2013,37(12):2371-2396
In a general equilibrium model of the world economy, we develop a two-dimensional energy balance climate model featuring heat diffusion and anthropogenic forcing driven by global fossil fuel use across the sphere of the Earth. This introduces an endogenous location dependent temperature function, driving spatial characteristics, in terms of location dependent damages resulting from local temperature anomalies into the standard climate-economy framework. We solve the social planner's problem and characterize the competitive equilibrium for two polar cases differentiated by the degree of market integration. We define optimal taxes on fossil fuel use and how they may implement the planning solution. Our results suggest that if the implementation of international transfers across latitudes is not possible then optimal taxes are in general spatially non-homogeneous and may be lower at poorer latitudes. The degree of spatial differentiation of optimal taxes depends on heat transportation. By employing the properties of the spatial model, we show by numerical simulations how the impact of thermal transport across latitudes on welfare can be studied. 相似文献
8.
The reduction of government debt to 60% of the GDP in order to satisfy the requirements of the Maastricht Treaty for participation in the European Monetary Union is one of the primary economic-policy goals for most of the European Union countries. The first aim of the present paper is to characterize the optimal path of the primary surplus that leads to the achievement of this Maastricht target. Using optimal-control theory we are able to determine an upper bound of the public-debt-to-GDP ratio above which no retrenchment policy becomes effective. The second issue taken up is that of the sensitivity analysis with respect to the initial level of the debt-to-GDP ratio, the growth rate of the economy, the interest rate, the inflation rate, and the inverse of the velocity of the monetary base circulation. 相似文献
9.
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