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41.
42.
Claudio Araujo 《Revue canadienne d'agroeconomie》1995,43(3):443-461
Cet article présente une analyse des décisions des agriculteurs brésiliens en situation d'incertitude. Après avoir souligné les problèmes liés au calcul de l'instabilité des prix en série temporelle, une équation d'offere est développée à partir d'un modèle « de sécurité>> selon lequel le producteur est supposé maximiser son profit espéré, sous des contraintes de liquidité et de sécurité. Le modèle est testé sur données de panel, pour trois produits — le coton, le riz et le maïs – de façon à mettre en évidence des différences de comportement vis-à-vis du risque de prix entre les agriculteurs du Nord-Est et du Centre-Sud du Brésil. 相似文献
43.
The goal of this paper is to check if different theoretical approaches to price formation can be verified in the structure of empirical input–output tables. From a propositive point of view, the hypothesis is made of two different markets (the ‘industrial’ market of intermediate and investment goods; and the ‘commercial’ market of final consumption goods), with two different mechanisms of price formation. The consequences of this hypothesis are outlined as regards deflation procedures. An empirical test of the theories about price formation and of the method of deflation suggested by the two-market hypothesis is made using 1985 Italian input–output tables at 1980 prices. 相似文献
44.
Claudio Schuftan 《Food Policy》1982,7(2):159-164
What drives nutritionists in their daily work? Why do they choose nutrition and not another field? Presumably it is the appeal of working, either locally or globally, to alleviate the suffering caused by malnutrition. This article explores the political awareness of nutritionists, the political implications of their daily activities and suggests an enhanced role for nutritionists in the battle against malnutrition. The starting point for this article is the motivating principles behind individual nutritionists. 相似文献
45.
AbstractGlobal tourism growth is unprecedented. Consequently, this has elevated the sector as a key plank for economic development, and its utility is deeply embedded in political, economic and social-ecological discourse. Where the expansion of the sector leverages natural and cultural landscapes, this applies pressure to social and ecological underpinnings that if not reconciled, can become problematic. The way this plays out in Australia’s Shipwreck Coast and the wider Great Ocean Road region, especially the implications for community resilience, is the focus. Emphasis is placed on the vulnerability of peripheral coastal areas to development that withdraws from destination endowments, yet fails to provide commensurate economic yield as a suitable trade-off. This is obvious where tourism intensification has led to concerns about the breach of normative carrying capacities. Temporal overtourism driven by seasonal overcrowding is countenanced as emblematic of tourism in the Anthropocene where focus tends to be largely growth-oriented, with much less attention given to bolstering social-ecological resilience, especially community resilience. At stake is the resilience of regional areas and their communities, who in the absence of garnering commensurate economic returns from tourism expansion find themselves in social and ecological deficit. 相似文献
46.
We define the concept of good trade execution and we construct explicit adapted good trade execution strategies in the framework of linear temporary market impact. Good trade execution strategies are dynamic, in the sense that they react to the actual realisation of the traded asset price path over the trading period; this is paramount in volatile regimes, where price trajectories can considerably deviate from their expected value. Remarkably, however, the implementation of our strategies does not require the full specification of an SDE evolution for the traded asset price, making them robust across different models. Moreover, rather than minimising the expected trading cost, good trade execution strategies minimise trading costs in a pathwise sense, a point of view not yet considered in the literature. The mathematical apparatus for such a pathwise minimisation hinges on certain random Young differential equations that correspond to the Euler–Lagrange equations of the classical Calculus of Variations. These Young differential equations characterise our good trade execution strategies in terms of an initial value problem that allows for easy implementations. 相似文献
47.
Economic freedom, which measures the protection of property and freedom to contract, is generally argued to capture the quality of a state’s institutions regarding market activity. As to be expected, numerous studies have found that economic freedom is associated with good economic outcomes. Additionally, much effort in public economics has worked to identify the features of quality non-market public institutions. No effort has been made to connect institutions that influence market activity and institutions that govern non-market activities. We take a first step. We employ a linear programming method for measuring relative efficiencies known as Data Envelopment Analysis. We apply this technique to information on the use of inputs to the production of the prosecution of crime across the thousands of local prosecutor offices in the U.S. We then compare state-level measurements of prosecution productivity with data on state-level economic freedom from the Economic Freedom of North America index. We show that there is a positive and statistically significant relationship between the two. Those states that develop institutions respecting economic freedom also tend to be the states that develop efficient publicly-provided services. The results are extended to complementary economic freedom measurements. 相似文献
48.
49.
Research on financial constraints of very small firms is scarce because it is difficult to observe and measure their transactions.
Previous studies on small enterprises in post-communist countries have focused either on the effect of financing constraints
on business growth (Budina et al., 2000, Economics of Transition
8(2), 453–475; Bratkowski et al., 2000, Economics of Transition
8(1), 101–116) or on the effect of property rights (Johnson et al., 2002, American Economic Review
92(5), 1335–1357). This paper provides evidence on both. It turns out that financing constraints and property rights considerations
affects investment in firms of different age differently. Younger firms face higher information costs and their expansion
is more dependent on the availability of internal funds than is the expansion of older firms. This paper also finds that while
the financial sector did not channel funds to the most successful businesses, there is evidence that loans were given to firms
that had more transparent transactions. Results also indicate that the security of property rights does not influence investment
in young firms, which is interpreted to mean that only the most efficient entrepreneurs entered the market. In older small
firms, investment is negatively influenced by the index of security of property rights suggesting that these firms might have
“secured” their property rights by bribes. Improvements in the security of property rights, therefore, would help more micro
enterprises to be born as well as decrease transaction cost of established enterprises.
相似文献
50.
Mobility and the Role of Education as a Commitment Device 总被引:2,自引:0,他引:2
In closed economies, human capital investment faces a hold-up problem of excessive redistributive taxation. Increased international labor mobility, however, changes the constraints which affect optimal education and tax policy. We show that in a non-altruistic, gerontocratic world, investments in human capital which increase the mobility of the young generation can be interpreted as a commitment device overcoming the hold-up problem. This is in line with Kehoe (1989) who derives a similar result with respect to capital mobility. 相似文献