The global warming phenomenon has undoubtedly brought unprecedented challenges to rice production, vital for food security in Southeast Asian countries and China. Most studies on this topic have focused narrowly on the direct effect of climate change on rice yield, neglecting the indirect effect. Using panel data from 30 provinces in China from 1990 to 2016, in this paper, we propose and test a mediational effect model to examine the mechanisms of how climate change affects rice yield. We find that climate change leads to changes in functional irrigation areas, farmers’ fertilizing behavior, and agricultural labor supply, and it is these mediating factors that effectively transmit the impact of climate change to China’s rice production. The positive indirect impact of climate change on the factors of production often partially or overly compensates for the adverse direct effect of climate change on rice yield, leading to a surprising observation of the association of climate change with increased rice yield, at least in the short run. We also provide some preliminary policy advice based on the analysis.

It has been more than ten years since China’s smart city was designated. However, no studies have given rigorous empirical evidence on the development of tourism under the construction of smart cities. Based on the panel data of 297 cities from 2000 to 2021, this paper uses three batches of smart city designations in China as quasi-natural experiments and constructs a time-varying difference-in-difference (DID) model to empirically test the tourism economic effects of smart city construction. It is found that smart city designation significantly increases urban tourism revenue by 24.3% and tourist arrivals by 17.2%. After the parallel trend test, the results of the dynamic DID model reveal the increasing tourism economic effect as the smart city construction progresses. Moreover, the potential Selection Bias and the specificity of the four municipalities in the model are taken into account, and false designated cities are randomly generated as placebos. A series of robustness tests enhance the credibility of the findings. Combined with the availability of data, this study verifies four main impact mechanisms, including attracting tourism investment, stimulating tourism entrepreneurial activities, improving tourism operational efficiency, and attracting relevant talents to work in tourism. Considering that the growth of smart economy may break the spatial barrier, we combine the spatial Durbin model with the DID model. The results based on the three spatial weight matrices all support the existence of spatial spillover tourism economic effects of the smart city construction. This study has implications for other countries with plans to upgrade urban construction patterns and transform traditional tourism.

The purpose of this study was to investigate the differences in farmland rent prices between land transferors and different transferees when considering the quality supervision cost of the transferred farmland. Moreover, the impact of the intervention of township governments, village committees, and other intermediary organizations on the rent price differences is also taken into consideration. The treatment effect model (TEM) and grouping regression model were used. The results showed that: (1) Owing to the different transaction costs, when leasing to village transferees, the land rent was significantly lower than when leasing to non-village transferees. (2) With the intervention of intermediary organizations, such as township governments and village committees, the constraints of the reputation mechanism between acquaintances were weakened, and the cost of information identification when land transferors searched for out-of-town transferees was reduced. As a result, the differences in land rent when transferring to the village and non-village transferees were narrowed. This study presents a different view to explain the transaction characteristics of the rural land transfer market in China. Further, it is of paramount importance to implement an effective public intervention, including strengthening the intermediary role of township governments and village committees, which is conducive to improving the rural land transfer market of most developing countries, including China.

The secret to ensuring food security and the growth of agricultural development is farmland production efficiency. In the context of urbanization, this means that farmers need to increase their off-farm employment behavior. The research goal of this paper is to explore whether this will have a impact on farmland production. This paper is based on the data of the China Land Economic Survey conducted by Nanjing Agricultural University and uses Tobit and other methods to conduct empirical tests. The main findings of this paper are as follows: (1) When the proportion of the household’s off-farm employment time is less than 73%, an increase in off-farm employment reduces farmland production efficiency. When the proportion of the household’s off-farm employment time exceeds 73%, an increase in off-farm employment increases the farmland production efficiency. (2) This paper eliminates the scale efficiency contribution in farmland production efficiency to obtain pure technical production efficiency. After verification, off-farm employment and farmland pure technical production efficiency show a U-shaped correlation and the inflection points of the two U-shaped curves coincide. (3) The reason for the inflection point is that after the off-farm employment of farmers reaches the inflection point, with a further increase in off-farm employment, the renting-out behavior of farmland increases and there is increased input of labor-saving technology in agricultural land production, because of which the production efficiency and pure technical efficiency of the farmland increase. To sum up, off-farm employment does not necessarily mean reduced farmland production efficiency. Farmland leasing behavior plays a key role in mitigating the impact of off-farm employment on farmland production. Therefore, in the process of urbanization, the improvement of the land transfer market, the development of agricultural socialized services, and the promotion of cooperative operation will help to ensure the productivity of farmland.