桂柳话方言区小学普通话教学体会

文章阐述了要提高桂柳话方言区小学普通话教育的有效性，必须认识桂柳话方言区小学生普通话学习过程，注意采用相应的教学方法和技巧，掌握有关教学原则。     

Price volatility of south-east fishery's quota species: an empirical analysis

This study investigates the autoregressive conditional heteroscedasticity (ARCH) and generalized-ARCH (GARCH) effects in the price series of Australian South-East Fishery's quota species. It is found that in all cases significant ARCH and/or GARCH effects are present. To search for the origins of these effects a weakly exogenous variable (trading volume) is introduced to the conditional variance equation of the ARCH and GARCH models, provided that such effects are observed in the first stage of investigation. It is found that in 14 cases the estimated coefficients of the trading volume are negative. In all cases, the 'trading volume' variable does not contribute to the removal of the ARCH and/or GARCH effects. Finally, the policy implications of the findings are discussed.     

浅谈高职院校普通话测试员队伍的建设

普通话测试员是高职院校推广普通话的中坚力量。一支水平高、素质强并具有一定实践能力和科研能力的测试员队伍,能为高职院校推广普通话更好的服务。针对目前高职院校测试员队伍管理的现状,本文提出了加强测试员的培训学习,健全和完善院级奖惩制度和建立健全院级视导员制度等三个方面的工作措施。     

Change and diversity in smallholder rice–fish systems: Recent evidence and policy lessons from Bangladesh

Efforts to unlock the genetic potential of both rice and fish, when combined with improvements in the management of rice–fish systems, can potentially increase agricultural productivity and food security in some of the poorest and most populous countries in Asia. In Bangladesh, estimates suggest that the country’s potential rice–fish production system encompasses 2–3 million hectares of land. But despite three decades of research on biophysical and technical aspects of rice–fish systems, this potential has not been fully realized due to insufficient attention given to the social, economic, and policy dimensions of rice–fish system improvement. This paper provides a characterization of the diverse and changing nature of rice–fish systems in Bangladesh to shed new light on the economic viability of different rice–fish systems and recommend policy and investment options to accelerate the development of appropriate rice–fish technologies. Data are drawn from a novel subdistrict-level survey of fishery officers, a household/enterprise survey, focus group discussions, and a meta-review of the literature on aquaculture in the country, all of which were conducted in 2010–2011. Findings indicate that concurrent rice–fish systems, alternating rice–fish systems, and collectively managed systems offer considerable potential for increasing productivity and farm incomes in Bangladesh. Findings also suggest that while innovation in these rice–fish systems is being driven by households and communities, there is need for more supportive government policies and investments to enable further innovation. Policymakers need to develop effective regulations to promote feed and fish quality and quantity, for example. More rigorous analysis of the intended and unintended impacts of these policies and investments is also necessary.     

A cost-benefit analysis of a public labelling scheme of fish quality

The purpose of this paper is to introduce a new method capable of evaluating the economic welfare for quality graded fish products using the hedonic price method for plaice in Denmark. Today, no labelling scheme exists for the final consumers of different qualities of fish. A scheme only exists at the first hand market. On this basis, a general applicable, theoretical and empirical method is developed to compare the costs and benefits of the hypothetical choice between the total absence of labelling and the presence of a public labelling scheme, which fully informs consumers on the quality and simultaneously allows the producers to differentiate prices between quality grades. It is shown that the economic welfare associated with a public labelling scheme is at minimum €263,000. Sensitivity analysis shows that this result is robust. The policy implication is that a public labelling scheme should not be implemented as the demand and cost functions have low elasticities, implying that the welfare gain is low.     

挖塘养鱼现象与耕地保护

耕地保护是我国一项必须长期坚持的基本国策,但挖塘养鱼现象在农村屡禁不止,对耕地造成严重破坏。本文基于阳春市河口镇金堡区的调查,分析其不断扩大的挖塘养鱼现象,探究其发展原因及存在问题。切实保护耕地,必须完善土地管理的相关法律制度,引导农业经济发展,提高农户的耕地保护意识。     

From researcher to farmer: partnerships in integrated aquaculture—agriculture systems in Malawi and Cameroon

The potential for integrating aquaculture with agriculture has been widely recognized as a means of improving the use of inputs, diversifying output and economic opportunity, and enabling smallholder producers to maintain and strengthen livelihoods. This paper describes the outcomes of this approach and explains the extent to which it has been taken up and has led to sustained and self-generated capacity. Based in particular on experience in Malawi, Ghana and Cameroon, it also considers implications more widely in the region. The overall picture is that this is a partial and still emerging success story, linked as much with the social and economic drivers surrounding smallholder farmers as with the development support approach adopted.     

Health-Orientation and Socio-Demographic Characteristics as Determinants of Fish Consumption

There are many research on consumer perception of fish product attributes. To increase fish consumption, as recommended by international health organizations and dietary guidelines, there is a need to better understand what drives consumers to fish consumption behaviour. The objective of the research is to explore determinants of fish frequency consumption, with focus on healthy attitude and socio-demographic or family structure characteristics. The research interviewed 740 consumers face-to-face. Data elaboration includes a factor analysis, with PCA and Varimax rotation, and multiple multivariate linear regressions. Results show that consumer health-orientation and social influences are better drivers to increase fish consumption frequency, compared to socio-economic characteristics, including households with children. Easing consumer time constraints and fish purchasing favor convenience and at home fish consumption frequency. Given the health advantages of higher fish consumption, government initiatives should support fish food industry marketing strategies.     

The role of social and technical excludability for the success of impure public good and common pool agreements: The case of international fisheries

We argue that international fisheries are a prime example to study the incentive structure of forming impure public good and common pool agreements. We consider a fully integrated multiple zone model, in which zones are linked through density-dependent migration. The incentive to accede to Regional Fishery Management Organizations (RFMOs) is related to multiple characteristics. Firstly, the relative patch sizes of the high seas, which is the internationally (publicly) accessible domain, compared to exclusive economic zones, which are state-owned (privately owned). This can be related to the degree of socially constructed excludability. Secondly, the intensity of fish migration between various zones, which can be related to the degree of technical excludability. Thirdly, the growth rate of the resource, which can be interpreted as the degree of rivalry, with a low (high) degree of rivalry approximating public good (common pool) features. We show that, generally, excludability reduces free-riding incentives but also the need for cooperation, a variant of the “paradox of cooperation”. Moreover, we show that the benefit-cost duality between public goods and common pool resources generally holds except for some extreme parameter values for which a low degree of rivalry fosters the success of cooperation. Finally, through a variation of the diffusion matrix, we can also analyze a closed as well as a sink-source system.     

The Role of Habit,Childhood Consumption,Familiarity, and Attitudes Across Seafood Consumption Segments in Australia

Australian consumers hold very favorable attitudes toward seafood, with key drivers to consumption being taste, convenience, diet variety, and health benefits. Nevertheless, despite these positive attitudes, seafood consumption remains below many other countries. In this article, we investigate the influence of habit including regular childhood consumption, familiarity with seafood, and attitudes toward seafood on seafood consumption and consumption occasions. Habit and lack of familiarity with seafood were found to lead to lower levels of seafood consumption, whereas positive attitudes toward seafood were associated with more regular seafood consumption. People who consumed seafood on a regular basis as a child were more likely to be more familiar with seafood and be in the habit of consuming seafood in adulthood. Patterns of childhood consumption occasions were found to be associated with adult consumption occasions. Based on these findings, we discuss possible strategies and behavioral interventions for further investigation, which are grounded in habit theory and are aimed at changing seafood eating habits, increasing childhood consumption, and reducing the lack of familiarity with seafood.