Effects of food and agricultural imports on domestic factors in the U.S. agricultural sector: a translog cost function framework

The translog cost function of the U.S. agricultural sector unveils dynamic relationships between foreign and domestic inputs. On average, capital and labour are weak substitutes, but they are strong substitutes to food and agricultural imports. Therefore, enhancing trade policies on food and agricultural products should be supplemented by strategic policies aiming at protecting domestic factors' income.     

Negotiation Based on Fuzzy Logic and Knowledge Engineering: Some Case Studies

One of the most recent mathematical models for negotiation is the Compensatory Negotiation Solution by Knowledge Engineering (CNSKE). In this model a logic system called Compensatory Fuzzy Logic was used, which is more adequate to solve problems of decision making than the classical one probabilistic fuzzy logic system. The idempotency axiom of this system and the continuity of the operators allow the truth-values of the membership function to have a cardinal and not exclusively ordinal semantic meaning. On the other hand, continuity also makes ‘sensible’ the truth-values of the predicates. The aim of this paper is to illustrate the advantages of the CNSKE over other approaches in Game Theory. To show these advantages, some case studies are analyzed, consisting on the solution of three problems in which CNSKE is applied in economic and politic cases of negotiation, and compared with other alternative approaches.     

Sustainable finance and investment: Review and research agenda

Sustainable finance and investment (SFI) is key to fostering sustainable global development. Research in this field has focused on specific topics, such as the financial performance of sustainable investments and companies committed to sustainability. The SFI literature is excessively fragmented, rendering it difficult to identify what constitutes the field and what differentiates it from traditional finance and investment. Based on a systematic literature review of 166 articles, we map and integrate the main elements of the SFI field and identify the most relevant avenues for further research. In this process, we provide a definition of SFI; identify the main players in the field; and describe their profiles, strategies, and outcomes. We also propose a framework for understanding the SFI field and a research agenda. This agenda organizes the main SFI research questions and suggests suitable approaches to address them. We conclude that SFI players have worked together to promote positive social and environmental impacts through their financial and investment activities. However, the under-theorization of the SFI concept, the traditional short-term nature of financial logic, and the lack of evidence on the SFI impacts on society and the environment are the greatest challenges facing the field.     

The relationship between prior and subsequent new venture creation in the United States: A county level analysis

Minniti [Minniti, M., 2004. Entrepreneurial alertness and asymmetric information in a spin-glass model. Journal of Business Venturing 19 (5), 637-658; Minniti, M., 2005. Entrepreneurship and network externalities. Journal of Economic Behavior & Organization 57 (1), 1-27] argues that new venture creation decisions are interdependent and that the non-pecuniary network externalities and path dependencies of such decisions influence the geographic concentration of venturing activities. We apply her framework at the county level to study the association between prior and subsequent new venture creation in the U.S. Our findings indicate that there is a non-linear relationship between prior new venture creation and subsequent new venture creation, with venturing activities increasing at an increasing rate based on the amount of prior new venture creation.     

The effects of repeated soil wetting and drying on lowland rice yield with system of Rice Intensification (SRI) methods

In lowland rice farming, water management is the most important practice that determines the productivity of other inputs, e.g. nutrients, herbicides, pesticides, farm machinery, microbial activity, mineralization rates. Deliberate flooding or poor drainage that keeps soil saturated is detrimental to crops and degrades soil quality. This study evaluated whether rice grain yield could be increased relative to continuous flooding by using the management practices of the System of Rice Intensification (SRI). The effects of SRI's repeated wetting and drying cycles plus different plant populations were investigated at Sapu Research Station in The Gambia, on an alluvial soil between 2000 and 2002. The water management practices proposed for SRI were found to be beneficial to rice growth. At 20 cm spacing, average grain yield with SRI practice was 7.3 t ha^?1 compared with 2.5 t ha^?1 under continuous flooding. At 30 cm spacing SRI practice yielded 6.6 t ha^?1, while under continuous flooding, grain yield was only 1.7 t ha^?1. Even wider spacing did not produce higher yield. At 40 cm spacing, SRI management gave 4.7 t ha^?1, while continuous flooding yielded 1.3 t ha^?1. Thus overall, SRI practices gave better results than continuous flooding. This was probably as a result of increased nutrient availability and superior growing conditions which enhanced physiological development and grain yield. Rewetting dry soil reportedly facilitates nitrogen mineralization. The phenomenon of having a flush of nitrogen mineralization occurring after rewetting dry soil was first reported by Birch in 1958. This intensive pathway of nitrogen mineralization and nitrogen availability has potential to increase lowland rice yields in ways consistent with sustainable agricultural production.     

Non-linear Effects of Inflation on Economic Growth in the Democratic Republic of the Congo

This paper presents one of the first empirical studies that employ the regression kink model with an unknown threshold to estimate the turning point in the relationship between inflation and economic growth. To deal with the asymptotic non-normality of the regression function, we use a numerical delta bootstrap method and inference methods in the construction of confidence intervals for the regression function. Our estimated threshold suggests that, in the Democratic Republic of Congo, inflation rates lower than 17.2% would drive economic growth, but any inflation rate beyond that threshold will harm the growth. The Congolese policymakers should be aware of this threshold in the implementation of any inflation-targeting policy instruments or strategies.     

Case Study: The Engineering Economics of RFID in Specialized Manufacturing

Calibrated tools are essential to producing highly specialized, defect-free parts. These tools are used in many processes in specialty manufacturing operations. Personnel could use the improper tool if the calibrated tool has been lost or stolen. This results in reduced business productivity and increased cost due to poor quality. This study demonstrates the cost effectiveness of using a radio frequency identification (RFID) system to track calibrated tools throughout a production facility. The costs of RFID tool tracking are described and return on investments of plausible scenarios are determined. Also, sensitivity analysis is performed utilizing spider plot and tornado diagrams.