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41.
Fabio Bagarello 《Quality and Quantity》2007,41(4):533-544
We review some recent results concerning some toy models of stock markets. Our models are suggested by the discrete nature
of the number of shares and of the cash which are exchanged in a real market, and by the existence of conserved quantities,
like the total number of shares or some linear combination of the cash and the shares. This suggests to use the same tools
used in quantum mechanics and, in particular, the Heisenberg picture to describe the time behavior of the portfolio of each
trader. We finally propose the use of this same framework in other sociological contexts. 相似文献
42.
Mattia Anesa Andreas Paul Spee Nicole Gillespie Fabio James Petani 《Journal of Management Studies》2024,61(3):857-887
The presence of conflicting cues about what is legitimate provided by various stakeholders, begs the question of how the legitimacy of contested institutionalized practices is justified. Recent critique of tax minimization strategies exemplifies this difficulty: on one hand, practitioners need to increase shareholders' profits; on the other, a growing number of stakeholders push for ‘fairer’ corporate tax payments. Conducted during a time of public criticism of Australian corporate tax strategies, our study draws on justifications of corporate tax minimization strategies by senior tax practitioners and corporate submissions to a Senate Inquiry on corporate tax avoidance. The study explores how legitimacy judgements come under pressure by conflicting cues. Through the application of Boltanski and Thévenot's (2006) Economies of Worth (EW) framework, we advance legitimacy scholarship by clarifying what constitutes situated judgements in times of instability. Our work puts forward the concept of perceived forecasted consensus as a guide for individuals in making situated legitimacy judgements in times of instability. 相似文献
43.
Fabio R. Chaddad Michael L. Cook Thomas Heckelei 《Journal of Agricultural Economics》2005,56(3):385-397
This study examines the presence of financial constraints in US agricultural cooperatives. We test the cooperative capital constraint hypothesis with a panel data econometric analysis of agricultural cooperatives’ investment behaviour. Regression results suggest that agricultural cooperatives’ capital expenditures are significantly affected by the availability of internal funds. Results also indicate that the sensitivity of investment to cash flow is correlated with cooperative structural characteristics. 相似文献
44.
This paper analyzes the effects of the form of ownership on the substitutability between internal and external sources of finance in Italy. In particular, we test whether financial constraints are more severe for independent firms compared to members of large national business groups and subsidiaries of foreign multinational corporations. The results obtained from flow of funds and investment equations estimated for a panel of Italian companies imply that independent firms face more severe financial constraints. In fact, not only members of national groups and subsidiaries of multinational corporations find it easier to substitute cash flow with external finance when the former falls but they do not display excess sensitivity to cash flow and debt in their investment decisions. 相似文献
45.
We provide methods for forecasting variables and predicting turning points in panel Bayesian VARs. We specify a flexible model, which accounts for both interdependencies in the cross section and time variations in the parameters. Posterior distributions for the parameters are obtained for hierarchical and for Minnesota-type priors. Formulas for multistep, multiunit point and average forecasts are provided. An application to the problem of forecasting the growth rate of output and of predicting turning points in the G-7 illustrates the approach. A comparison with alternative forecasting methods is also provided. 相似文献
46.
This paper considers Markov error‐correction (MEC) models in which deviations from the long‐run equilibrium are characterized by different rates of adjustment. To motivate our analysis and illustrate the various issues involved, our discussion is structured around the analysis of the long‐run properties of US stock prices and dividends. It is shown that the MEC model is flexible enough to account for situations where deviations from the long‐run equilibrium are nonstationary in one of the states of nature and allows us to test for such a possibility. An empirical specification procedure to establish the existence of MEC adjustment in practice is also presented. This is based on a multi‐step test procedure that exploits the differences between the global and local characteristics of systems with MEC adjustment. Copyright © 2004 John Wiley & Sons, Ltd. 相似文献
47.
We develop a model of monetary and fiscal policies appropriate for considering U.S.-European policy interactions in an era of near-balanced budgets and European monetary union. We study the determinants of policy trade-offs and incentives for central banks and governments across the Atlantic. Smaller, more open economies face more favorable trade-offs, since openness enhances policy effectiveness via the exchange-rate channel. Changes in Europe's monetary arrangements do not affect U.S. trade-offs, although they alter the trade-offs facing European policy-makers. Fiscal trade-offs depend crucially on the extent to which fiscal policy is distortionary. Changes in taxes and spending move both employment and inflation in the desired direction following a worldwide supply shock when spending is financed with distortionary taxes. 相似文献
48.
Summary. We study a one-sector stochastic optimal growth model with a representative agent. Utility is logarithmic and the production function is of the Cobb-Douglas form with capital exponent
. Production is affected by a multiplicative shock taking one of two values with positive probabilities p and 1-p. It is well known that for this economy, optimal paths converge to a unique steady state, which is an invariant distribution. We are concerned with properties of this distribution. By using the theory of Iterated Function Systems, we are able to characterize such a distribution in terms of singularity versus absolute continuity as parameters
and p change. We establish mutual singularity of the invariant distributions as p varies between 0 and 1 whenever
. More delicate is the case
. Singularity with respect to Lebesgue measure also appears for values
such that
. For
and
Peres and Solomyak (1998) have shown that the distribution is a.e. absolutely continuous. Characterization of the invariant distribution in the remaining cases is still an open question. The entire analysis is summarized through a bifurcation diagram, drawn in terms of pairs
.Received: 9 April 2002, Revised: 29 October 2002, JEL Classification Numbers:
C61, O41.Correspondence to: Tapan MitraThis research was partially supported by CNR (Italy) under the "Short-term mobility" program and by M.U.R.S.T. (Italy) National Group on "Nonlinear Dynamics and Stochastic Models in Economics and Finance" . We are indebted to Rabi Bhattacharya for providing us with the reference to Solomyak's (1995) paper. The present version has benefitted from comments by Mukul Majumdar and two anonymous referees. 相似文献
49.
Learning, monetary policy rules, and macroeconomic stability 总被引:1,自引:0,他引:1
Several papers have documented a regime switch in US monetary policy from ‘passive’ and destabilizing in the pre-1979 period to ‘active’ and stabilizing afterwards. These studies typically work with DSGE models with rational expectations.This paper relaxes the assumption of rational expectations and allows for learning instead. Economic agents form expectations from simple models and update the parameters through constant-gain learning. In this setting, the paper aims to test whether monetary policy may have been a source of macroeconomic instability in the 1970s by inducing unstable learning dynamics.The model is estimated by Bayesian methods. The constant-gain coefficient is jointly estimated with the structural and policy parameters in the system.The results show that monetary policy was respecting the Taylor principle also in the pre-1979 period and, therefore, did not trigger macroeconomic instability. 相似文献
50.
This paper attempts to combine the political economics models on separation of powers between the legislature and the executive with public choice theories on the behavior of the judicial branch. We obtain a model of political accountability and checks and balances with up to three government branches: the executive, the legislature and the judiciary. We conclude that an independent judiciary improves the political accountability of democratic systems relative to the political economics models with two government branches. An accommodating judiciary, however, changes the distribution of political rents without improving accountability. 相似文献