The impact of Air Service Agreement liberalisation: The case of Nigeria

The positive impact of air transport liberalisation as suggested by economic theories and empirical studies has inspired many developing countries like Nigeria to liberalise some of its Air Service Agreements (ASAs). This paper seeks to examine the extent to which international air service liberalisation has impacted upon Nigeria ten years after it was introduced. The research developed a cross-sectional model with passenger traffic as the dependent variable, while macroeconomic factors (trade and GDP), historical links, distance and ASAs (a proxy for liberalisation) served as independent or predictor variables. The analysis revealed a set of ASA stages in the country's policy-making process (restricted Bilateral Air Service Agreement, Open Skies Agreement and Yamoussoukro Declaration). Further analysis showed that the predictor variables were all significant in explaining passenger demand. The model demonstrated that the liberalisation of market access to the Open Skies Agreement level could stimulate traffic growth by at least 65 percent. The findings can assist in guiding policy and industry stakeholders in future decisions relating to liberalisation and ASAs.     

Performance measurement,expectancy and agency theory: An experimental study

Theoretical analyses of (optimal) performance measures are typically performed within the realm of the linear agency model. This model implies that, for a given compensation scheme, the agent’s optimal effort is unrelated to the amount of noise in the performance measure. In contrast, expectancy theory as developed by psychologists predicts lower effort levels for noisier performance measures. We conduct a real effort laboratory experiment and find that effort levels are invariant to changes in the distribution of the noise term. This suggests that enriching the economic model commonly applied within this area by including an expectancy parameter is not needed.     

我国长三角地区国家区域政策效果评价研究——基于偏相关和多元分布滞后模型

文章利用长三角地区上海市、江苏省以及浙江省的经济增长数据,构建多元虚拟变量分布滞后模型对国家长三角地区的区域发展规划效果进行评价。研究结果表明国家长三角区域发展规划政策出台后,不同政策变量对三地市的经济增长的影响存在差别,其中中央补助收入在上海和江苏的经济增长弹性显著提高,但是中央补助收入对浙江省的经济增长促进作用有所下降,同时中央转移支付与税收返还政策效果存在时滞。最后提出了结构上调整国家区域发展规划政策等对策建议。     

醇基涂料的研究现状与展望

介绍了醇基涂料的应用和研究现状,简述了消失模醇基涂料、V法醇基涂料、湿型砂醇基涂料、醇基流涂涂料以及厚大铸钢件醇基涂料的相关研究及应用效果,分析了醇基涂料的主要性能,如悬浮性、抗粘砂性等的研究成果,以及醇基涂料的性能要求和发展趋势,指出耐火骨料的粒度、级配和悬浮剂的选用对改善涂料悬浮性有重要作用,纳米复合悬浮剂、改性悬浮剂的使用使涂料悬浮性得到显著提高;不同粒度组合的耐火骨料和助熔剂的加入能改善涂料的抗粘砂性能,而转移涂料、醇基粉状涂料是未来醇基涂料的发展趋势,得出应研发具有水与醇兼溶的特殊悬浮剂和黏结剂来进一步提高涂料的悬浮性以及研制出强度高、抗开裂的高强涂料来提高涂料的抗粘砂性能。