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1.
Reciprocity in evolving social networks 总被引:1,自引:1,他引:0
We study the viability of conditional cooperation in a dynamically evolving social network. The network possesses the small world property, with high clustering coefficient but low characteristic path length. The interaction among linked individuals takes
the form of a multiperson prisoners’ dilemma, and actions can be conditioned on the past behavior of one’s neighbors. Individuals
adjust their strategies based on performance within their neighborhood, and both strategies and the network itself are subject
to random perturbation. We find that the long-run frequency of cooperation is higher under the following conditions: (i) the
interaction radius is neither too small nor too large, (ii) clustering is high and characteristic path length low, (iii) the
mutation rate of strategies is small, and (iv) the rate of adjustment in strategies is neither too fast nor too slow.
相似文献
Rajiv SethiEmail: |
2.
Schmitt-Grohé and Uribe (NBER wp 10724, 2004b) analyzes the optimal, simple and implementable monetary policy rules in a medium-scale macromodel, as the one proposed by
Christiano et al. (J Polit Econ 113:1–45, 2005). In doing so, they use a sensible, but somewhat arbitrary constraint to account for the lower bound condition on the nominal
interest rate. In this work, we check the robustness of their main results to such a criteria. We find that the optimal policies
are actually absolutely robust to the easing of this criterion for all the different cases considered.
相似文献
Guido AscariEmail: |
3.
Dimitris K. Christopoulos 《Empirica》2007,34(3):273-280
This short paper explores the relationship between investment and saving rates in a sample of 13 OECD countries over the period
1885–1992. To this end, I employ panel cointegration tests based on the maximum likelihood approach developed by Johansen
(J Economic Dynamics Control 12:231–254, 1988) instead of conventional panel cointegration residual based tests, in order to draw sharper conclusions. Using estimation
techniques appropriate for heterogeneous panels I find a low degree of capital mobility for the sub-periods 1921–1992 and
1950–1992. The findings overwhelmingly support the hypothesis of perfect capital mobility in the short run.
相似文献
Dimitris K. ChristopoulosEmail: |
4.
Corrado Andini 《Portuguese Economic Journal》2009,8(1):15-22
In a seminal paper, Levine et al. (J Monet Econ 46:31–77, 2000) provide cross-sectional evidence showing that financial development has positive average impact on long-run growth, using
a sample of 71 countries. We argue that the evidence is sensitive to the presence of outliers.
相似文献
Corrado AndiniEmail: |
5.
We analyse forecasts of professional forecasters for Germany regarding the time span from 1970 to 2004. This novel panel data set renders it possible to assess the accuracy and efficiency of growth and inflation forecasts more efficiently than in previous studies. We argue that the forecasts are, on average, unbiased and weakly—but not strongly—efficient. Using model confidence sets suggested by Hansen et al. (2004), we find that, besides the effect of diverging forecasting dates, no other substantial differences in forecasting quality among forecasters exist. Nevertheless, on the basis of a direction-of-change analysis we argue that it is not always advisable to listen to the majority of forecasters.
相似文献
Ulrich Fritsche (Corresponding author)Email: |
6.
Khaled Bennour 《International Review of Economics》2009,56(2):163-173
This paper extends the prey–predator model of Grossman and Kim (J Political Econ 103:1275–1288, 1995) to analyze the relation between the value of a contested rent and the emergence of conflict. We show that an increase in
the value of the rent makes a conflict equilibrium more likely. We also analyze the case where the valuation of the rent is
different for the two players. We find, for example, that a conflict equilibrium may occur even though the predator has an
important disadvantage in warfare. That is when his valuation of the rent is sufficiently high compared to that of the prey.
相似文献
Khaled BennourEmail: |
7.
This study measures cost inefficiency of Kansas public school districts and applied both mathematical programming and stochastic
frontier approach. The empirical study uses two-stage data envelopment analysis model and the cost inefficiency effects model
proposed by Battese and Coelli (Empirical Economics 24:325–332, 1995) and applied to a panel data. The results found mean inefficiencies from these two models are very close. The results indicate
that Kansas school districts, on average, exhibit cost inefficiency in their operations, however, there is a tendency for
inefficiencies to decline over time. The study does not find any strong evidence for lower efficiency due to lower expenditure
per-pupil. Instead, we found inconclusive evidences where lower efficiency for certain school districts could be assigned
to unfavorable environmental cost conditions.
相似文献
John PoggioEmail: |
8.
This study examines the impact of a stamp tax rate increase on market behavior, using data from two stock exchanges in China. We find that when the tax rate increases from 0.3 to 0.5% (which implies that the transaction cost increases by about 1/3) trading volume decreases by 1/3. This implies an elasticity of turnover with respect to a stamp tax of −50% and an elasticity of turnover with respect to transaction cost of −100%. The markets’ volatility significantly increases after the increase in the tax rate. Furthermore, the change in the volatility structure indicates that the markets become less efficient in the sense that shocks are less quickly assimilated in the markets.
相似文献
Badi H. Baltagi (Corresponding author)Email: |
Dong LiEmail: |
Qi LiEmail: |
9.
The behavior of the exchange rate in the genetic algorithm with agents having long memory 总被引:1,自引:1,他引:0
Yiping Xu 《Journal of Evolutionary Economics》2006,16(3):279-297
This paper studies the behavior of the exchange rate in Kareken and Wallace (1981)'s model under the genetic algorithm adaptation with agents having long memory. The simulation results show that, if agents have full memory, the average portfolio fraction will converge, and the initial equilibrium that it converges to is history dependent. Under the lasting evolutionary pressure of the noise trader, the market will eventually drift from one equilibrium to another, and asymptotically will converge to the neighborhood of an equilibrium with agents putting their savings equally into two currencies. If the agents do not have full memory, the foreign exchange market will show periodic crisis. Before and after a market crises, the average portfolio fraction will converge to different stationary equilibria. A mean difference equation of the average portfolio fraction is also given to describe the dynamics of the model.
相似文献
Yiping XuEmail: |
10.
Robert D. Tollison 《The Review of Austrian Economics》2009,22(2):127-130
Besley’s treatment of principled agents is a major contribution to public choice and political economy. By focusing on politics
as an agency problem, he has shown the way to a new generation of research on the interface of politics and economics.
相似文献
Robert D. TollisonEmail: |
11.
Philipp Engler Terhi Jokipii Christian Merkl Pablo Rovira Kaltwasser Lúcio Vinhas de Souza 《Empirica》2007,34(5):411-425
This paper analyzes the role of banks’ regulatory capitalization in the transmission of monetary policy. We use a confidential
dataset for Austrian banks spanning from the first quarter of 1997 to the fourth quarter of 2003. We find evidence that Austrian
banks react in an asymmetric way to monetary policy depending on their regulatory excess capitalization, i.e. low capitalized
banks react more restrictively to a monetary tightening than their highly capitalized peers.
相似文献
Lúcio Vinhas de SouzaEmail: |
12.
George C. Bitros 《The Review of Austrian Economics》2008,21(4):301-328
This paper centers on the structure of capital and the useful lives of its components by considering an economy with two representative
firms, one producing a necessity and another producing a luxury. This difference determines their reinvestment opportunities.
Therefore, while the one applies replacement, the other adopts scrapping. However, as these capital policies lead to different
service lives, the analysis confronts the issues raised by Miller (Review of Income and Wealth 29:284–296, 1982, Review of Income and Wealth 36:67–82, 1990) and deals with them by drawing on Haavelmo’s (A study in the theory of investment, Chicago: The University of Chicago Press, 1960) suggestions regarding the aggregation of capital. Among other findings, it turns out that the simulation results are highly
robust, thus demonstrating that real-world implications may be even stronger than strictly suggested by the model.
相似文献
George C. BitrosEmail: |
13.
We use the Markov regime-switching ARCH (SWARCH) model of Hamilton and Susmel (J Econometrics 64:307–333, 1994) to document the presence of high volatility regimes in six Latin American countries (Argentina, Brazil, Chile, Mexico, Peru,
and Venezuela). We found four high volatility episodes, each associated to either a local (the Mexican crisis of 1994, the
Brazilian crisis of 1998–1999, the Argentinean crisis of 2001–2002) or a worldwide financial crisis (the Asian financial crisis
of 1997). However, we found that the effects of each financial crisis are short-lived and that between 2 and 4 months after
each crisis, all markets return to low volatility regimes.
相似文献
Stephen K. PollardEmail: |
14.
Paresh Kumar Narayan 《International Advances in Economic Research》2008,14(3):280-290
In this paper we analyze per capita incomes of the G7 countries using the common cycles test developed by Vahid and Engle
(Journal of Applied Econometrics, 8:341–360, 1993) and extended by Hecq et al. (Oxford Bulletin of Economics and Statistics, 62:511–532, 2000; Econometric Reviews, 21:273–307, 2002) and the common trend test developed by Johansen (Journal of Economic Dynamics and Control, 12:231–254, 1988). Our main contribution is that we impose the common cycle and common trend restrictions in decomposing the innovations into
permanent and transitory components. Our main finding is permanent shocks explain the bulk of the variations in incomes for
the G7 countries over short time horizons, and is in sharp contrast to the bulk of the recent literature. We attribute this
to the greater forecasting accuracy achieved, which we later confirm through performing a post sample forecasting exercise,
from the variance decomposition analysis.
相似文献
Paresh Kumar NarayanEmail: |
15.
Burczak reformulates socialism to escape Hayek’s strictures against central planning. While Hayek supports a social safety
net as well as other liberal reforms, Burczak points out that these reforms fall outside Hayek’s theoretical framework. We
explain that this is because Hayek narrowed the classical economists’ conception of sympathetic agency to imitation and rule
following. By contrast, liberal reform proposals follow from the theoretical framework of Adam Smith and John Stuart Mill.
For Smith and Mill, sympathy is a richer concept in which people change places imaginatively with others. Sympathetic agency
allows a wide range of other regarding actions and political reforms.
相似文献
David M. Levy (Corresponding author)Email: |
16.
Jean-Pierre Lévy Mangin Jaime de Pablo Valenciano Tamás Michal Koplyay 《International Advances in Economic Research》2009,15(2):186-206
Relations between manufacturers and distributors have been the center point of the distribution channel’s management. This
study covers the effects of coercive, as well as non-coercive power on intermediary variables such as cooperation and conflict.
It will also analyze the effects of cooperation and conflict on American car dealers’ satisfaction and performance in Spain.
Due to the small sample size (46 dealers), the model based on causal modeling compelled us to use the optimization method
based on the partial least squares (PLS) regression techniques coupled with a bootstrapping to enable some generalization
of the results.
相似文献
Jean-Pierre Lévy ManginEmail: |
17.
Antonio Ribba 《Empirical Economics》2006,31(2):497-511
In this paper, by using a combination of long-run and short-run restrictions, we identify a small structural VECM which includes inflation, unemployment and the federal funds rate and study the dynamic interactions at different frequencies among these variables. Our results show that: (a) in accordance with the traditional view of economic fluctuations, aggregate demand shocks and monetary policy shocks push inflation and unemployment in opposite directions in the short run; (b) the permanent supply shock explains the long-run movement of inflation and unemployment. These conclusions are at odds with the prediction of “natural-rate” models but are consistent with the idea of a propagation mechanism which links productivity shocks to inflation and unemployment at medium and low frequencies. Thus, with respect to some recent studies (e.g. Beyer and Farmer, ECB Working Paper 121, 2002, and Ireland, J Monet Econ 44:279–291, 1999), we offer a different interpretation of the low-frequency comovements between inflation and unemployment characterizing the US economy in the last decades.
相似文献
Antonio RibbaEmail: |
18.
The application of the rational choice postulate to a political context invariably leads to the conclusion that most voters
are ill informed when making the decision on whom to vote for. In this paper, the authors conduct an empirical evaluation
of the rational ignorance theory, based on the model developed by (Rogoff and Sibert Rev Econ Stud LV:1–16, (1988) and by considering that better informed voters reward political candidates who show better performances. The levels of performance
are established through the construction of an empirical frontier using the Data Envelopment Analysis (DEA) methodology. According
to our results, based on the 1997 Portuguese local elections, even though swing voters do not necessarily behave as rationally
ignorant voters, a large majority of voters are rationally ignorant.
相似文献
José da Silva CostaEmail: |
19.
Jianpei Li 《Portuguese Economic Journal》2009,8(2):119-136
This paper analyzes the efficiency of team production when risk-neutral agents exhibit other-regarding preferences. It is
shown that full efficiency can be sustained as an equilibrium of a budget-balancing mechanism that punishes some randomly
chosen agents if output falls short of the efficient level but distributes output equally otherwise. The result depends on
agents being sufficiently inequity-averse.
相似文献
Jianpei LiEmail: |
20.
Cost-Benefit Analysis (CBA) is typically portrayed as a technique for promoting efficiency in government. We don’t deny that
CBA can be used in this manner, but instead focus on a different property of CBA, namely, its evolution from scholarly musings
into a framing institution within which budgetary processes operate. The evolution of CBA into institutional status, moreover,
shows the value of bringing a polyarchical perspective to bear on fiscal organization, wherein budgetary outcomes emerge through
structured interaction among participants. CBA is a product of interaction within a political ecology, as distinct from being
the product of some person’s optimizing choice.
相似文献
Richard E. WagnerEmail: |