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排序方式: 共有149条查询结果,搜索用时 15 毫秒
31.
This paper investigates the effects of crop genetic diversity on farm productivity and production risk in the highlands of Ethiopia. Using a moment-based approach, the analysis uses a stochastic production function capturing mean, variance, and skewness effects. Welfare implications of diversity are evaluated using a certainty equivalent, measured as expected income minus a risk premium (reflecting the cost of risk). We find that the effect of diversity on skewness dominates its effect on variance, meaning that diversity reduces the cost of risk. The analysis also shows that the beneficial effects of diversity become of greater value in degraded land.  相似文献   
32.
33.
This article traces the flow of municipal solid waste from southern Italy through a waste-to-energy facility and district heating system in Austria, examining the roles that waste's transformation from contaminant to commodity to fuel plays in interconnected, distributed, and contested urbanization processes. It contends that, while metabolic circulation hides socioecological costs in one place to facilitate valorization in another, specific spatial configurations emerge through territorialization—of waste economies, in this case—providing the spatial base to realize metabolic flows and to anchor political narratives. A decisive effect is that certain patterns of urbanization become locked-in, impeding alternative metabolic transitions and spatial configurations. Attending to the coproduction of three sites—Naples, Italy; Zwentendorf, Austria; and St Pölten, Austria—through the circulation and transformation of waste and energy the article provides an empirical multi-sited case study of a political ecology of urbanization.  相似文献   
34.
Since its introduction, integrated reporting (IR) has triggered a rich debate covering several aspects, from the structure and the features of a document to the effects of its publication. Very recently, scholars have examined the negative relationship between IR and the cost of capital for firms, completely missing the opportunity to understand whether this fact is contingent on the cultural context that adopting companies operate in. We fill this gap by resorting to a panel sample of 211 adopters from 31 countries over the period spanning 2009–2017, counting 1,455 observations. Our evidence confirms that adopters, on average, benefit from a 1.4% decrease in the cost of capital. Yet, more importantly, IR effectiveness is exalted in countries with low power distance, strong collectivism values, and high level of masculinity, while uncertainty avoidance, long‐term orientation, and indulgence do not seem to play any moderating role.  相似文献   
35.
Using height data for recruits of a principal regiment at Buenos Aires, the paper revises the question of welfare in Argentina during the period 1900-1934. The period of rapid export-led growth (1900-1913) showed an absolute deterioration of “net nutrition.” On the other hand, the inter-war period (1918-1939), generally characterized as a period of economic “delay” or “retardation,” presented a steady improvement in nutrition and health conditions. Two powerful external shocks, World War I and the Great Depression, had a minimal impact on the biological welfare of Argentine recruits. Economic growth generated important regional and social inequalities.  相似文献   
36.
In the Italian Time use survey, carried out by Istat (Italian National Statistical Institute) in 2002–2003, the coding process translates the sentences reported by the respondents into codes, but association text-code is not a one to one easy linkage, because the respondents describe the activities performed using the common language. So, a process of data editing is requested in order to improve data quality. The possibility to use sentences (recorded in the data entry) has definitely improved the data editing process. The main questions to analyse concern:
(a)  particular ancillary codes used by coders to point out daily diary’s problems;
(b)  incompatibility between codes and codes and between codes and text;
(c)  errors in the intervals’ sequences.
This paper shows methodological and contextual choices in order to build the process of data editing. In particular, it is focused on the analysis of techniques and deterministic rules adopted and on the analysis of imputation system to correct adequately the wrong codes, with reference to the entire diary. This paper was presented at the XXVI IATUR (International Association for Time Use Research) Conference held in Rome, 27–29 October 2004. The authors share contents and views expressed in this paper. However, the paragraphs are so drafted: Salvatore F. Allegra drew up the paragraphs 1, 2, 3, 7; Barbara Baldazzi drew up the paragraphs 4, 5, 6, 8. Salvatore F. Allegra and Barbara Baldazzi drew up the paragraph 9.  相似文献   
37.
Learning,market selection and the evolution of industrial structures   总被引:6,自引:0,他引:6  
Industrial economics is a rich source of puzzles for economic theory. One of them — certainly the most discussed — regards the co-existence of firms (and plants) of different sizes, displaying rather invariant skewed distributions. Other puzzles, however, concern the sectoral specificities in industrial structures, the persistence of asymmetric corporate performances and the dynamics of entry and exit. The paper reports some preliminary results on evolutionary modeling of the links between the microeconomics of innovation, the patterns of industrial change and some observable invariances in industrial structures.First, the paper reviews a few of these empirical regularities in structures and in the patterns of change. Second, the paper discusses the achievements and limits of interpretations of the evidence based on equilibrium theories. Finally, it presents a model where these regularities are explained as emergent properties deriving from non equilibrium interactions among technologically heterogeneous firms. Moreover, simulation exercises show that also the intersectoral variety in the observed industrial structures and dynamics can be interpreted on the grounds of underlying specificities in the processes of technological learning — which is called technological regimes — and of the processes of market interactions — i.e. market regimes.This research has undertaken within an on going project sponsored by the Italian Research Council (CNR, Progetto strategico,Cambiamento tecnologico e sviluppo economico). Support by the Consortium on Competitiveness and Cooperation Centre for Research in Management, University of California at Berkeley is also gratefully acknowledged.  相似文献   
38.
Patterns and Determinants of International Fragmentation of Production: Evidence from Outward Processing Trade between the EU and Central Eastern European Countries. — In this paper we investigate a specific form of international fragmentation of production, that is, the form giving rise to international trade for reasons of processing. Data on textile and apparel trade between EU countries and Central European countries show that the magnitude of trade for reasons of processing greatly overshadows that of final trade. The industry appears to be affected by a process of international fragmentation whose understanding requires a new definition of the concept of comparative advantage. Our analysis suggests that this fragmentation is activated by labor cost differentials as well as by reasons of geographic and cultural proximity.  相似文献   
39.
Many developing countries grapple with high rates of farmland degradation and low agricultural productivity amidst increasing climate variability. Considerable efforts have been exerted to promote the diffusion of improved farmland management to address these challenges. Despite these efforts, adoption rates, especially of soil conservation and water harvesting technologies, are still low, which has been the subject of investigation in several studies in Ethiopia and elsewhere. Most studies on the adoption of these technologies, however, tend to focus on economic incentives only, paying little attention to the role of social capital. This article provides evidence of the effects of different dimensions of social capital on innovation adoption across households holding different levels of risk aversion. We address this issue by using cross section and panel data from Ethiopia. Results show that social capital plays a significant role in enhancing the adoption of improved farmland management practices. We also find evidence that the effect of social capital across households with heterogeneous risk taking behavior is different.  相似文献   
40.
Individual consumers have quickly embraced the practice of using a variety of channels through which to make their purchases, as 65-70% of them are multichannel shoppers. Indeed, multichannel shoppers (defined as those who utilize a variety of different purchasing channels, including bricks-and-mortar stores, the telephone, and the Internet) are now in the majority, and spend significantly more than single-channel shoppers. Given this reality, it is critical that organizations adopt a multichannel mindset and effectively employ a multichannel marketing program, as these can enhance profitability, the customer experience, and customer satisfaction. It is the aim of this article to provide firms with guidance in developing an effective multichannel mindset and in designing a multichannel marketing program for serving end-consumers in business to consumer (B2C) situations.  相似文献   
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