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101.
Has the Single Market for public procurement had the expected effects after six years in progress? The following article attempts to answer this question by first presenting alternative theoretical approaches to analysing the EU liberalisation of the public procurement market and then confronting these with the result of an empirical analysis. 相似文献
102.
Damoun Ashournia Per Svejstrup Hansen Jonas Worm Hansen 《Review of International Economics》2013,21(5):1048-1059
This paper analyzes how a reduction in trade costs influences the possibility for firms to engage in international cartels, and hence how trade liberalization affects the degree of competition. We consider a particular intra‐industry trade model amended to allow for firms producing differentiated products. Our main finding is that trade liberalization may have an anti‐competitive effect. We find that there is no unique relation between a reduction in trade costs and the degree of competition. When products are differentiated, a lowering of trade costs is pro‐competitive if trade costs are initially high, but anti‐competitive if trade costs initially are low. Hence, trade policy is not necessarily a substitute for competition policy. 相似文献
103.
104.
We consider the properties of three estimation methods for integrated volatility, i.e. realized volatility, Fourier, and wavelet estimation, when a typical sample of high-frequency data is observed. We employ several different generating mechanisms for the instantaneous volatility process, e.g. Ornstein–Uhlenbeck, long memory, and jump processes. The possibility of market microstructure contamination is also entertained using models with bid-ask bounce and price discreteness, in which case alternative estimators with theoretical justification under market microstructure noise are also examined. The estimation methods are compared in a simulation study which reveals a general robustness towards persistence or jumps in the latent stochastic volatility process. However, bid-ask bounce effects render realized volatility and especially the wavelet estimator less useful in practice, whereas the Fourier method remains useful and is superior to the other two estimators in that case. More strikingly, even compared to bias correction methods for microstructure noise, the Fourier method is superior with respect to RMSE while having only slightly higher bias. A brief empirical illustration with high-frequency GE data is also included. 相似文献
105.
Morten Fibieger Byskov 《Oxford Development Studies》2017,45(3):352-365
In this paper I offer a normative account of development expertise. Although extending expertise beyond the traditional development experts to include local stakeholders, this normative account aims to delimit legitimate forms of expertise. I label this normative view third wave development expertise. Third wave expertise is distinguished from both the technocratic and the social constructivist views of development expertise. In particular, I discuss the notions of contributory and interactional expertise. Contributory expertise denotes the extent to which a group of agents possesses (tacit, embodied, or explicit) knowledge which can make a significant contribution to development decision-making, while interactional expertise denotes the extent to which they are able to communicate this knowledge meaningfully. While local stakeholders may possess contributory expertise in matters of their own development, they may lack interactional expertise to communicate this knowledge. Resolving this issue, I argue, requires a mediator who can interact with and between external experts and local stakeholders. 相似文献
106.
Hyeongwoo Kim Ippei Fujiwara Bruce E. Hansen Masao Ogaki 《Journal of Applied Econometrics》2015,30(6):874-903
It is well known that there is a large degree of uncertainty around Rogoff's consensus half‐life of the real exchange rate. To obtain a more efficient estimator, we develop a system method that combines the Taylor rule and a standard exchange rate model to estimate half‐lives. Further, we propose a median unbiased estimator for the system method based on the generalized method of moments with non‐parametric grid bootstrap confidence intervals. Applying the method to real exchange rates of 18 developed countries against the US dollar, we find that most half‐life estimates from the single equation method fall in the range of 3–5 years, with wide confidence intervals that extend to positive infinity. In contrast, the system method yields median‐unbiased estimates that are typically shorter than 1 year, with much sharper 95% confidence intervals. Our Monte Carlo simulation results are consistent with an interpretation of these results that the true half‐lives are short but long half‐life estimates from single‐equation methods are caused by the high degree of uncertainty of these methods. Copyright © 2014 John Wiley & Sons, Ltd. 相似文献
107.
We characterize the compensation demanded by investors in equilibrium for incremental exposure to growth-rate risk. Given
an underlying Markov diffusion that governs the state variables in the economy, the economic model implies a stochastic discount
factor process S. We also consider a reference growth process G that may represent the growth in the payoff of a single asset or of the macroeconomy. Both S and G are modeled conveniently as multiplicative functionals of a multidimensional Brownian motion. We consider the pricing implications
of parametrized family of growth processes G
ε
, with G
0=G, as ε is made small. This parametrization defines a direction of growth-rate risk exposure that is priced using the stochastic
discount factor S. By changing the investment horizon, we trace a term structure of risk prices that shows how the valuation of risky cash flows depends on the investment horizon. Using methods of Hansen
and Scheinkman (Econometrica 77:177–234, 2009), we characterize the limiting behavior of the risk prices as the investment horizon is made arbitrarily long. 相似文献
108.
W. Lee Hansen 《The Journal of economic education》2013,44(3):231-242
The case for adopting a proficiencies approach to instruction and learning in the economics major is reiterated. This approach focuses on what graduating majors should be able to do with the knowledge and skills they acquire in the major, that is, their ability to demonstrate their learning in practical ways. The author's list of five proficiencies, advanced in the mid-1980s, is reviewed and revised; one additional proficiency is added and several others are refined. The author discusses the emphasis given to these proficiencies with top economics undergraduates at two major research universities, the author's experience with incorporating these proficiencies into his instruction, and the challenge of assessing the ability of economics majors to demonstrate these proficiencies. 相似文献
109.
Jared M. Hansen Robert E. McDonald Ronald K. Mitchell 《Journal of the Academy of Marketing Science》2013,41(3):300-319
Marketing strategists should create, maintain, and arrest the decay of causally ambiguous resource competences that lead to competitiveness and thus performance. However, competence causal ambiguity, which helps create competitiveness, is also implicated in competitiveness decay. In this study we test a model of specialization-competitiveness-performance using primary and secondary data from 169 public respondents/firms, to examine the effects of negative internal barriers to replication and adaptation. These barriers develop due to resource lock-in arising from the same specialization processes that lead to the positive barriers to imitation that deter competitors. Results suggest that commitment to learning can mitigate resource lock-in problems with internal competence causal ambiguity, competence causal ambiguity among competitors appears more essential to competitiveness in more competitive markets, competitiveness positively relates to both shareholder value and new product performance, and an increased differential focus on marketing versus operations in the organization strengthens the positive bridge between organizational competitiveness and shareholder return. 相似文献
110.
This paper develops an international trade model where firms in a duopoly may diversify their technologies for strategic reasons. The firms face the same set of technologies given by a tradeoff between marginal costs and fixed costs, but depending on trade costs firms may choose different technologies. Market integration may induce a technological restructuring where firms either diversify their technologies or switch to a homogeneous technology. In general, market integration improves welfare. However, a small decrease of trade costs which induces a switch from heterogeneous technologies to a homogeneous technology may locally reduce global welfare. The model also shows that productivity differences lead to intra‐industry firm heterogeneity in size and exports similar to the “new–new” trade models with monopolistic competition. 相似文献