The outbreak of Novel Coronavirus Pneumonia (NCP) has significantly affected China and beyond. How to effectively control such epidemic has gradually become a global issue. This paper reviews the economic impact of major epidemics such as SARS, H1N1, and Ebola at the micro-, sector-, and macro-level. The challenge of effective epidemic control is to achieve a balance between viral transmission reduction and economic cost. This paper then summarizes three main methods to evaluate the effectiveness of several control policies. We also find that the adequacy and authenticity of information disclosure is of great importance to minimize economic loss, as either public panic due to overestimation or lack of public awareness due to underestimation can cause additional negative economic impacts. Accurate and transparent disclosure of information plays a crucial role associated with fighting against the epidemic. Finally, the paper puts forward a number of policy recommendations to minimize economic loss while controlling the spread of COVID-19.

PurposeThis article investigates the mechanism of the direct and indirect effects of epidemics on agricultural production and projects the impact of COVID-19 on agricultural output in China.Design/methodology/approachThis article first adopts a dynamic panel model and spatial Durbin model to estimate the direct and indirect effects, followed by a growth accounting method to identify the channels by which epidemics affect agriculture; finally, it projects the overall impact of COVID-19 on agriculture.FindingsThe incidence rate of epidemics in a province has a negative impact on that province's own agricultural productivity, but the increase in the input factors (land, fertilizer and machinery) can make up for the loss and thus lead to insignificant direct effects. However, this “input-offset-productivity” mechanism fails to radiate to the surrounding provinces and therefore leads to significant indirect/spillover effects. It is projected that COVID-19 will lower China's agricultural growth rate by 0.4%–2.0% in 2020 under different scenarios.Research limitations/implicationsIt is crucial to establish a timely disclosure and sharing system of epidemic information across provinces, improve the support and resilience of agricultural production in the short run and accelerate the process of agricultural modernization in the long run.Originality/valueConsidering the infectivity of epidemics, this article evaluates the mechanism of the direct and indirect effects by introducing a spatial dynamic model into the growth accounting framework. Moreover, besides the impact on input portfolio and productivity, this article also investigates whether epidemics reshape agricultural production processes due to panic effects and control measures.

In this work we have systemically characterized the adsorption complexes of formaldehyde and its reaction intermediates to CO 2 formation on the Cu(100) surface using periodic DFT method. We found that formaldehyde reaction with surface O is thermodynamically more favorable compared with the reaction path of formaldehyde with OH.

Based on early experiences and current conditions, a future time perspective influences college students’ behaviors, while psychological violence critically threatens college students’ health. This study explored the relationship between a future time perspective and the psychological violence of perpetrators based on an online investigation of 1424 college students (87.1% women) aged 17 to 31 in China. The results showed that a future time perspective is significantly positively associated with psychological violence. Positive future orientation is negatively associated with psychological violence. Negative and confused future orientations are positively associated with psychological violence. These findings support the need to introduce an intervention regarding a future time perspective to reduce psychological violence among college students.

The construction of 2‐deoxy‐C‐glycosides has gradually become a hotspot of carbohydrate chemistry in recent years. In this work, we present an efficient, regioselective, stereoselective and widely applicable strategy for the synthesis of 2‐indolyl‐C‐deoxyglycosides via Ir(I)‐catalyzed, pyridine‐group‐directed C−H functionalization. This method exhibits high tolerance for the functional groups of indoles and the protecting groups of carbohydrates. Moreover, this protocol has good stereoselectivity and mainly produces β‐configuration products. Gram‐scale synthesis and several practical transformations were conducted for further applications. Meantime, we also explored the mechanism of this method and proposed a catalytic cycle