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This paper aims to examine whether China's grain price support policy has distorted the grain market price.

The time-varying differences-in-differences (DID) model is used to study the impact of support policies on grain prices, and it is combined with the event study method to explore the dynamic effects of price support policy. Panel data model is used to study the effect of the price support policy on price formation for national grain market prices. In addition, we apply the smooth transformation (STR) model to verify whether there is a distortion in the transmission of grain prices among different markets in China and from the international market to China’s market.

China’s grain price support policy plays a significant role in rising grain market prices, weakens the decisive role of the market mechanism in the formation of grain prices, hinders the spatial transmission of market price signals and decreases the effect of price transmission from the world market to China’s market.

In order to ensure both the stability of grain production as well as the market stability, and also to ensure that intervention policies do not distort the food market, the minimum purchase price of grain and market regulation policies should be adjusted as follows: (1) price support policy should be shifted to an income support policy and (2) reasonably determine the scale of reserves and implement a grain minimum purchase price policy in limited areas.

Our findings are relevant for understanding the effect of China's grain price support policies on the implementation regions and the price transmission effect, which provide reference experience for developing countries to implement food price policies.

The study aims to address the gap between leaders’ preventative self-regulatory focus and its impact on Chinese primary care physicians (PCPs) well-being, measured by work–family spillover stress and work exhaustion and on healthcare quality, measured by preventive service delivery and clinical guideline adherence.

This paper conducted a cross-sectional in-person survey with 38 leaders and 224 PCPs in 38 primary health centers (PHCs) in Jinan, Tianjin, Shenzhen and Shanghai. Guided by the regulatory focus theory, this paper built hierarchical linear regression models to examine the association between the leadership’s regulatory focus and physician burnout, work–family conflict, clinic guideline adherence and preventive service delivery.

This paper added the knowledge of leadership’s regulatory focus impact on the well-being and medical service quality of PCPs. Prevention regulatory focus of leaders was significantly associated with work exhaustion and physicians’ reported work–family conflict. There is no significant association between leadership’s prevention regulatory focus and PCPs’ preventive service delivery or clinical guideline adherence.

Data on the regulatory focus of PCPs were not collected. Future studies should collect longitudinal data, allowing for exploration of the mechanism.

This paper revealed that PHC leaders should restructure their leadership focus away from preventive regulatory behavior, promoting a team atmosphere and enhancing PCP attitudes, behaviors and well-being.

To improve the well-being of PCPs and the quality of medical services, our results recommend a focus on establishing a positive organizational culture and addressing the emotional and professional needs of PCPs. To achieve these aims, policymakers should implement measures that promote a more comprehensive and balanced regulatory focus within PHC institutions. These measures should aim to create an environment that supports physician well-being and enhances the quality of healthcare services. Providing ample resources and support, promoting a collaborative team atmosphere and encouraging open communication are vital to empowering PCPs.

This study examined the preventive regulatory focus of PHC leaders on the well-being and medical service quality of PCPs in China.

To reveal the effective ways for leaders to motivate employees' innovative behaviour in complex environmental situations, the leadership rapport orientation is subdivided into two types of values-based/instrumental rapport orientation. The mechanism of supervisor developmental feedback in mediating between leadership rapport orientation and employees' innovative behaviour and the moderating effect of ambidextrous environments is explored. This paper aims to discuss the aforementioned objective.

Leadership rapport orientation is divided into value-based and instrumental rapport orientation to reveal effective ways for leaders to motivate employees' innovative behaviour in complex environmental situations.

The results show that the values-based (instrumental) rapport orientation of leaders impacts employees' innovative behaviour positively (negatively).

Leaders' values-based/instrumental rapport orientation indirectly influences employees' innovative behaviour through supervisor developmental feedback, which positively moderates the relationship between the values-based or instrumental rapport orientation of leaders and employees' innovative behaviour and further moderates the partially mediating role of supervisor developmental feedback between leaders' values-based/instrumental rapport orientation and employees' innovative behaviour.