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排序方式: 共有266条查询结果,搜索用时 15 毫秒
61.
Jos Giacomo Baccarin Jonatan Alexandre de Oliveira Glucia Elisa Mardegan 《Journal of Agrarian Change》2020,20(4):598-617
From 2007 to 2017, the Agro‐Environmental Protocol of the Sugar and Energy Sector was in force, an agreement between sugarcane mill owners and the State Government of São Paulo, Brazil, proposing to eliminate sugarcane burning as a method to facilitate the harvest. Simultaneously, the sugarcane harvest was becoming widely mechanized while, under the interests of capital accumulation, the mills were entering the information and communication technology era and providing the agricultural processes with more precise and immediate management and technological controls, similar to those implemented in the mills' administrative and industrial operations in the 1990s. Short‐term factors, including environmental factors, favoured sugarcane technological changes. As a result, there was a mass layoff of rural workers and an increasing number of people/workers in agricultural mechanization, transportation and maintenance of machinery and administrative as well. The whole process highlighted the differences between mills, resulting in small and medium sugarcane farmers and mills to become the most impacted, in operational and financial terms, by the accelerating mechanization of the sugarcane industry as a whole. 相似文献
62.
The future demand for data and the role of gigabit networks are central issues in the context of Next Generation Access (NGA) network roll-out. Based on a generic model, which allows to predict unconstrained future broadband demand in different regions and countries, the authors compare the results for Germany, the UK and the Flemish region, and discuss reasons for the different outcomes. The generic market potential model thereby allows to project the future demand for bandwidth from residential customers on the basis of applications and their bandwidth needs, user profiles and population structure on a household level. Despite a general trend towards an increasing need for broadband, there are clear differences. On the one hand, these point to the relevance of socio-demographic factors for broadband adoption. On the other hand, the relatively high proportion of refusals shows that there is still a need for further educational work on the part of public authorities and providers. Finally, it has to be stated, that our forecast relies on the assumption that connectivity and thus that the availability of area-wide gigabit capable broadband access does not represent a bottleneck. 相似文献
63.
Lucas Oliveira Gomes Ferreira Andr Luiz Marques Serrano Federico Revelli 《Review of urban and regional development studies : RURDS : journal of the Applied Regional Conference》2019,31(3):203-233
The objective of the present study is to verify the flypaper effect of 476 Brazilian municipalities from 2005 to 2012, considering the new variables as instruments of grants. Political alignment, alignment of the party, and coalition of the mayor with the federal president and of the state governor were considered as instruments of grants. A municipal tax autonomy index was considered as a control variable, which represents the percentage of local taxes in the municipal total revenues. The results allow concluding that the flypaper effect exists in Brazilian municipalities and is intensified by the alignment of the representatives in the same way of theoretical literature (Hamilton 1983; Hines & Thaler 1995; Inman 2008) and previous empirical studies in Brazil. Moreover, evidences of higher flypaper effect were found in municipalities with low tax autonomy. 相似文献
64.
Henriques Paulo Lopes Curado Carla Oliveira Mírian Maçada Antônio Carlos Gastaud 《Quality and Quantity》2019,53(3):1301-1324
Quality & Quantity - The study based on an online survey covering 655 researchers from hard and soft sciences addresses the influence of different conditions on academic publishing. Results... 相似文献
65.
Guilherme Resende Oliveira Guilherme Mendes Resende Diego Firmino Costa da Silva Caio Nogueira Gonalves 《Review of Development Economics》2019,23(1):293-313
This paper evaluates the micro‐impacts of regional development funds in Brazil—the Constitutional Financing Funds (CFF)—using fixed effects panel data models and generalized propensity score between 2000 and 2012. Assessing the industrial and commerce/services sectors using fixed effects models, the results provide weak evidence of a positive and statistically significant impact of the CFF on job creation and no statistically significant impact on labor productivity growth at the firm level. Regarding dose‐response estimates, the results present evidence of nonlinear effects after three years of financing, suggesting that the amount of subsidized credit plays an important role in creating jobs and improving firm productivity. 相似文献
66.
The literature on transparency and central bank communication and the literature on disagreement about expectations are evolving; however, both have been evolving separately. Despite the advances in the literature, several key issues remain open and there are gaps to be filled. Therefore, this study analyses the effects of monetary policy signalling and clarity of central bank communication on disagreement about inflation expectations. It also investigates whether greater transparency coincides with lower levels of disagreement in inflation expectations in Brazil. The findings suggest that transparency is important to reduce disagreement about inflation expectations. Moreover, our estimates indicate that central bank communication and clarity affect disagreement about inflation expectations in Brazil. 相似文献
67.
Since 1945, both Spain and Portugal have experienced significant market transformations. These countries were both led by
dictators for many years until the mid 1970s when each moved toward more democratic governments and more open markets. As
a result, each experienced significant changes in output with Spain’s becoming a model for proper market based transformations.
Although Portugal’s transformation has been less impressive it experienced improvements too. This paper uses a Parente and
Prescott (J Polit Econ 102(2), 298–321, 1994; 2000) type model to investigate the recent transformations in each of these countries and quantify the extent to which barriers
to technological adoption may have played for these two development experiences. Our results indicate that from 1945 to 2003
these barriers have fallen considerably but remain high, and are somewhat higher in Portugal than in Spain. 相似文献
68.
This paper applies nonparametric decision tree models to the analysis of financial leverage decisions. This approach presents three appealing features: (i) the relationship between leverage and explanatory variables is not predetermined but is derived from information provided by the data, (ii) the models respect the fractional nature of leverage ratios, and (iii) each covariate is allowed to influence in different ways the financial leverage decisions of firms automatically assigned to different groups. Based on a data set of Portuguese firms, decision trees are used to tackle both classification (the decision to issue debt) and regression (the decision on the amount of debt to be issued, conditional on using debt) problems. It is found that: (i) two‐part models are the most appropriate specification for explaining the overall amount of debt used by firms, (ii) there are no drastic differences between the results produced by tree and parametric models, although some divergences may arise, and (iii) tree models suggest relationships between covariates and leverage that parametric models fail to capture, especially when the sample size is small. 相似文献
69.
Martine Druant Silvia Fabiani Gabor Kezdi Ana Lamo Fernando Martins Roberto Sabbatini 《Labour economics》2012,19(5):772-782
This paper presents new evidence on the patterns of price and wage adjustment in European firms and on the extent of nominal rigidities. It uses a unique dataset collected through a firm-level survey conducted in 17 European countries and covering various sectors. Several conclusions are drawn from this evidence. Firms adjust wages less frequently than prices, on average every 15 and 10 months, respectively. Price and, especially, wage adjustment exhibit a substantial degree of time-dependence. In particular, wage changes tend to cluster at a specific time of the year, mostly January in the majority of countries. The results of a multivariate analysis indicate that prices are more flexible when competitive pressures in product markets are strong and when labor costs account for a lower fraction of firms' total costs, whereas wages are more flexible when bargaining is decentralized and when the coverage of collective bargaining and the stringency of employment protection legislation are low. Price rigidities are higher in firms with a larger share of high-skilled/white-collar workers. 相似文献
70.
Impacts of Hedonic and Utilitarian User Motives on the Innovativeness of User‐Developed Solutions 下载免费PDF全文
Ruth Maria Stock Pedro Oliveira Eric von Hippel 《Journal of Product Innovation Management》2015,32(3):389-403
When individual consumers develop products for their own use, they in part expect to be rewarded by the use value of what they are creating (utilitarian user motives), and in part expect to be rewarded intrinsically by such things as the fun and learning experience derived from creating it (hedonic user motives). This paper shows a first‐of‐type study to understand the relationship between individual consumers' motives to innovate and the novelty and utility of the solutions they develop. The theoretical framework integrates self‐determination theory and goal‐setting theory. The major findings of this study are that utilitarian user motives positively affect the utility of user‐developed innovations. In contrast, hedonic user motives drive solution novelty; the more an innovator is “in it for fun,” the more novel the solution developed. However, hedonic user motives also have an inverted U‐shaped relationship with solution utility. When the dominant motive for developing an innovation is the joy of the creative process rather than use value, the utility of what is developed is negatively affected. These findings are of research interest, and can be of significant practical interest to producers hoping to benefit from user‐developed innovations. For the first time, it has been possible to show that the adjustment of hedonic rewards, for example by means such as gamification, can affect the nature and utility of solutions individuals create. 相似文献