我国蔬菜价格垂直传导的非对称性研究——基于面板VAR模型的实证

运用面板向量自回归模型(PVAR)对我国蔬菜的生产价格、批发价格和零售价格的垂直传导机制进行实证研究,结果表明我国蔬菜三种价格的波动幅度和增长速度自上而下呈依次增强的特征;价格的正向传导顺畅,逆向传导存在一到两期的滞后,传导强度上存在正向传递强度明显高于逆向传递的非对称现象;生产价格在整个价格波动的传导链中占主导地位,蔬菜价格的稳定在很大程度上依赖于蔬菜的生产环节。     

中国农药施用与农业经济增长脱钩状态：时空特征与影响因素

[目的]明确农药施用与农业经济增长关联状态及其影响因素,为实现"控药减害增收"的目标提供借鉴。[方法]基于2005—2015年数据利用脱钩理论和对数平均分解指数法分解进行分析。[结果]中国农业经济增长伴生大量农药施用,仅少数省域表现出农药施用和农业经济增长扩张绝对脱钩的理想状态,东北西北部分省域农业经济增长则以更大幅度的农药投入增长为代价。中西部地区劳动力规模和技术进步效应是推动农药施用与农业经济增长脱钩的因素;东部地区种植规模变化、劳动力规模和技术进步因素均是推动农药施用和农业经济增长脱钩的因素;东北地区仅劳动力规模效应成为推动脱钩的力量。[结论]推动农药施用与农业经济增长脱钩需要强化农业科技的创新与普及,完善农业生产过程中的技术支撑,推动农业病虫害监测预警,加大对环境友好型低污染农药和肥料的推广度;构建农户施药的多重约束机制,完善农业病虫灾害保险减少农户对生产过程的风险感知,发挥农业合作社对农户施药行为的规制作用,完善产品分级认证和安全准入制度;通过农地合理流转和农业机械化等方式集约利用农业生产资源;因地制宜推动农药施用与农业经济增长脱钩,结合区域资源优势和农业发展阶段有针对性地设计对策措施。     

山西省农业生态经济系统协调发展及障碍因子分析

目的 以山西省为例,探究其农业生态经济系统协调发展水平、演变规律以及限制因素,对加快山西省农业全要素融合、促进农业高质量可持续发展具有重要意义。方法 文章综合运用熵值法、耦合协调发展模型和限制因子识别模型,从山西省市两级分别分析2010—2020年农业资源利用—生态环境—经济发展系统（REE系统）耦合协调度和障碍因子,探究其发展水平、演变规律以及限制因素。结果 （1）研究期间全省层面农业REE系统处于较低至中等水平,变化趋势是先降低后增加。其中农业经济发展有所提升,生态环境得到一定改善,但资源利用水平呈现下降趋势。耦合协调等级：2010—2012年轻度失调,2013—2016年进入濒临失调阶段,2017—2020年提升为勉强协调。（2）区域层面,以太原市发展水平最高,并向轻度协调发展过渡;阳泉市和运城市表现为最低水平;其他地区为较低水平。变化趋势以太原市、大同市增速稳定,忻州市、临汾市和吕梁市3市发展波动性较大。耦合协调等级：太原市、大同市、长治市3市为勉强协调型;晋城市、晋中市2市为濒临失调型;其他6市均为轻度失调型。（3）障碍因子识别包含13个主要指标。结论 山西省农业REE系统整体水平为较低到中等,耦合度高,耦合协调度相对低,协调等级逐年优化,表现为有序发展趋势。近年来山西省农业资源型经济转型取得一定进展,但资源对经济发展的支撑作用正在减弱,约束作用开始突显,尤其表现在产业结构、水资源、耕地资源、环境污染和治理等方面,区域尤以晋西南地区的吕梁市、临汾市和运城市为重,产业结构优化和资源环境改善等发展模式有待加强。     

持久性收入对中国农民消费影响分析

运用弗里德曼的持久性收入假说分析我国农民的消费问题,并利用计量经济学的方法对中国历年农民消费统计数据进行分析,得出“持久性收入及持久性收入的边际消费倾向对我国现阶段农民消费支出影响较大”的结论,并从增加持久性收入和提高持久性收入的边际消费倾向两个方面就增加农民消费提出政策建议。     

Micro-celebrity restaurant manifesto: The roles of innovation competency,foodstagramming, identity-signaling,and food personality traits

Dining in Internet-celebrity (or micro-celebrity) restaurants is an increasingly popular indulgence. Rooted in the micro-celebrity economy research, the present study draws on self-signaling and self-determination theories to propose an integrated research framework that examines how extrinsic and intrinsic factors impact customers’ intention to revisit micro-celebrity restaurants. External social needs (i.e., restaurant competence, signaling identity, and foodstagramming benefits) and internal personality traits (i.e., neophilic and neophobic tendencies) are synthesized to better understand their impacts on conative propensities. The findings indicate that foodstagramming benefits mediates the relationship between restaurant competence and intention to revisit, whereas neophilic renders a boundary condition suppressing this relationship. However, neophilic and neophobic tendencies positively moderate the effect of identity-signaling.     

The global effects of productivity gains in Asian emerging economies

This paper investigates international responses of key macroeconomic variables to simultaneous shocks to productivity in the traded sector in eight Asian emerging and developing countries. We use panel estimation techniques to construct component sub-models in a thirty country global vector autoregressive (GVAR) model. We identify the shocks by using sign restricted impulse responses. We find that increases in traded-sector productivity in Asian emerging and developing countries have a positive effect on economic growth and international trade for most countries.     

Hedge funds and their prime broker analysts

Are sell-side analysts reluctant to go against the investment views of their hedge funds when these hedge funds are their prime brokerage clients? We show that prime broker analysts tend to upgrade stocks recently bought by their clients. For stocks with upgraded recommendations, post-announcement cumulative abnormal returns are significantly lower for those purchased by the prime brokerage clients. Our results are stronger with high-dollar-turnover clients who generate more trading commissions. We also find that a hedge fund with a large bet on a stock has a stronger incentive to pressure the fund’s prime brokers to issue a favorable recommendation on the stock. Results are not driven by stocks of firms with low analyst coverage or small size.     

The impact of liquidity constraints on the cash-futures basis dynamics: Evidence from the Chinese market

This study investigates the impact of liquidity constraints on the dynamics of the cash-futures basis in the Chinese futures market. By analyzing the trading behaviors of hedgers, speculators, and arbitrageurs in a liquidity constraint context, we document two effects: the expectation effect and the liquidity effect. We further propose a set of threshold vector error correction models (VECMs) for the CSI 300 index and CSI 300 index futures to examine these two effects separately and jointly. We find evidence for both effects. We also find that a basis-liquidity-based threshold VECM, which includes both effects, performs well in explaining why the degree of persistence of a large basis depends on the direction of divergence in the cash-futures price relationship, a stylized fact we observe in the Chinese futures market.     

Sources of inequality in the Philippines: Insights from stochastic dominance tests for richness and poorness

New stochastic dominance (SD) tests of richness and poorness are applied to income and expenditure distributions in the Philippines to measure relative welfare levels and investigate sources of inequality from 2000 to 2012. We successfully demonstrate that welfare analyses based on ascending and descending SD principles offer a stronger characterisation of changing levels of welfare in a population than what could be obtained using standard SD approach alone. Empirically, our results show that large improvements in relative welfare over time in the Philippines favoured older and female-headed households, mainly in the urban areas. Further, female headship and more years in education promoted higher welfare within and among the population groups. On the other hand, the growth of remittance incomes may have caused the greater imbalance in the distributions found in more recent years. Analysis by age groups meanwhile showed that over time, there are increasing concentrations of poorer households among the youngest cohort (30 and under), at the same time that there are also increasing concentrations of richer households among the over 60s. The combined impact of these factors provides a viable explanation as to why the gap between the rich and the poor has remained high in the Philippines for a very long time now.     

Shareholder litigation rights and stock price crash risk

We study the impact of shareholder-initiated litigation risk on a firm's stock price crash risk. Our empirical analysis takes advantage of the staggered adoption of universal demand laws, which led to an exogenous decline in derivative litigation risk. We find that a decline in the threat of derivative litigation reduces crash risk and that information hoarding associated with earnings management is a channel through which litigation risk affects crash risk. The relationship is also moderated by how exposed firms are to the other primary form of shareholder litigation, namely securities class-action lawsuits.