湖南省森林公园旅游发展地区差异研究

森林公园旅游是森林旅游的重要组成部分,研究森林公园旅游区域协调发展对于推进森林旅游可持续发展和林业产业结构调整具有重要意义。以2010—2019年湖南省14个市州森林公园数量、面积、旅游接待人数和旅游收入数据为基础,运用位序—规模分布理论与首位分布理论,对湖南省森林公园旅游规模差异及其分布状况进行了分析。结果表明:(1)湖南各市州森林公园旅游发展的绝对差异在扩大,但相对差异变化不大。(2)湖南省森林公园旅游发展不均衡情况总体上表现为森林公园数量<森林公园面积<旅游接待人数<旅游收入的局面。(3)在排名上,大部分市州都出现了一定波动,但在旅游接待人数和旅游收入方面,张家界一直稳居首位,娄底的旅游收入排名有大幅度上升。文章最后简要探讨了这种差异形成的原因和应对措施。     

External pressure or internal culture? An innovation diffusion theory account of small retail businesses’ social media use

COVID-19 put unprecedented external pressure on small businesses to adopt or increase use of social media while not all small businesses are internally ready for this rapid change. This study investigated the roles of external pressures and organizational culture of openness and learning in driving small retail business owners'/managers' social media use decisions by impacting their perceived usefulness and barriers, based on the innovation-decision process model from the diffusion of innovations theory and the theory of reasoned action. An online survey with structured measurements was administered to 411 U.S. small retail business owners/managers. Results from structural equation modeling revealed that external pressures positively influenced small business owners'/managers’ perceived usefulness and barriers and social media use intention. In addition, the culture of openness and learning positively influenced the perceived usefulness while mitigating the perceived barriers, thereby directly and indirectly influencing the social media use intention. Theoretical and managerial implications are discussed.     

Smart technology and service employees’ job crafting: Relationship between STARA awareness,performance pressure,receiving and giving help,and job crafting

Owing to the rapid spread of smart technology, artificial intelligence, robotics, and algorithms (STARA), service jobs are being replaced by these technologies. Despite the potential effect of STARA awareness on employee outcomes, surprisingly few studies have explored its role service employees' work outcomes. Addressing this gap, our research assessed the mediating relationship between STARA awareness, performance pressure, and job crafting, as well as the moderating effects of help-receiving and help-giving on this relationship. We conducted a quantitative study for 301 South Korean service employees using surveys collected at two points in time. The results indicated that service employees' STARA awareness positively affected job crafting through performance pressure. Furthermore, the association between STARA awareness and performance pressure was more prominent for higher levels of help-receiving than for lower levels of help-receiving. Help-receiving further moderated the indirect effect of performance pressure on the STARA awareness and job crafting relationship. While the mitigating effect of help-giving was not supported, we observed a significantly positive association between STARA awareness and performance pressure only when help-receiving was high and help-giving was low. These findings contribute to the literature on technology in the retailing sector by uncovering how STARA awareness affects service employees’ performance pressure and job crafting and the roles played by help-giving and help-receiving in this relationship.     

Error analysis of finite difference and Markov chain approximations for option pricing

Mijatovi? and Pistorius proposed an efficient Markov chain approximation method for pricing European and barrier options in general one‐dimensional Markovian models. However, sharp convergence rates of this method for realistic financial payoffs, which are nonsmooth, are rarely available. In this paper, we solve this problem for general one‐dimensional diffusion models, which play a fundamental role in financial applications. For such models, the Markov chain approximation method is equivalent to the method of lines using the central difference. Our analysis is based on the spectral representation of the exact solution and the approximate solution. By establishing the convergence rate for the eigenvalues and the eigenfunctions, we obtain sharp convergence rates for the transition density and the price of options with nonsmooth payoffs. In particular, we show that for call‐/put‐type payoffs, convergence is second order, while for digital‐type payoffs, convergence is generally only first order. Furthermore, we provide theoretical justification for two well‐known smoothing techniques that can restore second‐order convergence for digital‐type payoffs and explain oscillations observed in the convergence for options with nonsmooth payoffs. As an extension, we also establish sharp convergence rates for European options for a rich class of Markovian jump models constructed from diffusions via subordination. The theoretical estimates are confirmed using numerical examples.     

Public attention to “Islamic terrorism” and stock market returns

Does public attention to Islamic terrorism affect the performance of Islamic and conventional indices? We answer this question by empirically examining the effects of US public attention to Islamic terrorism on returns of US Islamic and conventional indices between 2004 and 2017. US public attention to Islamic terrorism is measured using Google Search Volume, which reflects active public attentiveness, and media coverage, which measures passive attentiveness. We test its effect on the stock returns of Islamic and conventional indices by using difference-in-difference analysis. The results indicate that US public attention to Islamic terrorism negatively affects US Islamic indices, suggesting that investors may make amalgams between terrorism and Islamic finance. These clichés may lead them to sell Sharia-compliant assets when US public attention to Islamic terrorism is high. Taken together, our findings provide new evidence and financial implications for investors and providers of Islamic financial products.     

跳频信号的归一化多普勒频差最大似然估计

针对双站定位涉及的跳频信号多普勒频差估计问题，提出了归一化的频差最大似然估计算法，利用两个定位站接收到的跳频脉冲串信号，构建一个关于基准跳频频率多普勒频差的似然函数，通过网格搜索得到使似然函数最大的多普勒频差估计，既解决了跳频信号在不同跳频频率上多普勒频差不一致的问题，又充分利用在不同频率的脉冲串信号提高了多普勒频差估计精度。通过仿真对算法的性能进行了评估，结果表明，与基于子空间的算法比较，在脉冲数达到240个时，所提算法执行效率提升30%以上。     

Young consumers in the digital era: The selfie effect

This article investigates a mechanism named the selfie effect. By their frequent sharing of selfies on social media, perhaps displaying their cool new fashions or newly acquired tattoos, young people—unintentionally—help providers to promote their products and services, and thereby contribute to the commercial pressure. The existence of a selfie effect builds on hypotheses originating from a pilot interview study concerning how young adults master the consumer role. In this article, the existence of a selfie effect is investigated in a nationally representative web survey with 1,707 respondents aged 16–60, living in Norway. While 59% of the teenagers said they were posting selfies weekly or more often, only 2% among those in their fifties did. The multivariate quantitative analyses support the idea that teenagers and young adults, frequently online, become vulnerable in the consumer role. Particularly posting selfies and following bloggers increase consumer detriment and overconsumption.     

基于县统筹财政分权视角下的地方义务教育公平研究 ——来自山东省的实例

由于基层政府长期存在财力事权上的不均衡,我国基层地区义务教育供给存在着差距。2001年的"以县为主"的县统筹财政制度开始实行,义务教育的负责主体变成了县级政府。借助2002年到2016年的山东省县级数据,运用泰尔指数作为分析工具,结合此期间山东省出台的教育改革措施,分析其对于缩小义务教育差异的影响。研究发现,政策制度仅仅改善了中等收入县级地区之间的差距,对于高收入和低收入地区并没有太好的效果,就目标而言,由于县级各地区上经济实力和义务教育规模的固有差距,导致无法取得理想中的效果。     

Exchange market pressure and primary commodity – exporting emerging markets

This paper studies short-term sensitivity between exchange market pressure and various domestic and external factors in primary commodity-exporting emerging markets. The paper focuses on the top country-commodity groups in sugar, cereal, fuels, ores and coffee during the pre-peak and post-peak commodity price periods across floating and pegged exchange rate regimes, using the price of crude oil as a general benchmark. Employing a panel model and panel VAR analysis, the paper finds the heterogeneity of response patterns unique to country-commodity groups and exchange rate regimes. According to the results, in flexible regimes, volatility occurs via the foreign exchange market, interest rates, and domestic credit cycles, feeding into the social costs for structurally weaker economies. Hard exchange-rate pegs often result in a drain on international reserves as the terms of trade deteriorate following post-price peaks, leading to unpopular depreciation. These results accentuate concerns over uneven international trade patterns, an open economy’s short-term foreign exchange policy, and speculative capital flows. Such sensitivity has broad implications for macroeconomic balance and the sustainability of implied exchange rate targets in the presence of a foreign exchange constraint across emerging markets.     

Revisiting global economic activity and crude oil prices: A wavelet analysis

Based on the wavelet analysis approach, this paper firstly examines the dynamic relationship between global economic activity (proxied by the Kilian economic index) and crude oil prices in both time- and frequency-domains. Our empirical results demonstrate significant correlation between crude oil prices and global economic activity at high frequencies (in the short run) during the entire sample period; however, the co-movement between the two at low frequencies (in the long run) is weaker and exists only during certain proportions of the sample period. We also document evidence that global economic activity and oil price are positively correlated, with dynamic lead-lag relationships across time. Our findings are robust to alternative choices of oil price indexes and controlling for other confounding factors such as geopolitical risk, armed conflicts, economic policy uncertainty and equity market uncertainty. The current study provides valuable implications for oil market investors based on the information of global economic situation and its dynamic relationships with oil prices.