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Telemedicine and telehealth hold promise for reducing access barriers, improving quality, and containing medical costs. As Internet companies enter the healthcare market, a rising number of online healthcare platforms have emerged worldwide. In some countries like China, public hospital doctors are providing direct-to-consumer telemedicine services on these commercial platforms as independent providers. Such online service provision creates a new form of dual practice, which we refer to as “online dual practice” in this study. Using a mixed-methods design, this study aims to investigate the prevalence of online dual practice, doctors’ time allocation and motivations for engaging in it, and its potential impacts on the health system in China. We use the web-crawled data from four leading online health platforms to examine the prevalence of online dual practice in China. Then we conduct in-depth interviews with 38 active doctors on these platforms to investigate their time allocation, motivations, and perception regarding online service provision. We find that the nationwide prevalence of online dual practice in China reaches at least 16.5% in 2020, and that it is more common among senior public hospital doctors. Public hospital doctors mainly use small pockets of time during working hours and after-hours to render services on the platforms. The five most commonly cited motivations for their engagement in online dual practice are efficiency improvement, personal control, career development, financial rewards, and serving the patients. Interviewed doctors believe that their online service provision is conducive to increasing healthcare access and improving efficiency, but some also express their concerns about the quality of care. Further analysis shows that the impact of online dual practice on health system performance remains an open question and regulatory policies on it should be health-system specific.

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Parking facilities in central urban areas have limited supply, high utilization, and turnover rate, leading to the high parking cost. To draw the issues of parking uncertainty, high search time, and underutilization of parking lots, this study shows the application of permits in parking management. It first analyzes the characteristics and costs of “arrival priority” and “reservation priority” modes, and then, it proposes the parking permit reservation and allocation mode based on “service order optimization” and designs an “ant colony-genetic” algorithm to solve the optimal service order. The numerical example shows that the measures of quantity control and matching optimization are effective in parking management. The parking reservation mode of “service order optimization” has advantages in parking lot utilization rate, service demand quantity, and total parking cost.

Parking problems are getting increasingly serious in the urban area. However, the parking spots in the urban area are underutilized rather than really scarce. There is a large number of private spots in the residential areas that have the potential of being shared. Due to its private nature, shared parking is usually operated by a profitable mode. To study the utilization of shared parking and its impact on the morning commute, this paper proposes an evolution model. The supply side is a profit-chasing manager who decides on the selling prices and the business scale, while the demand side refers to travellers who respond to costs and choose the trip mode. By analysing the behaviour (strategy) of both sides, the study covers: 1 - the attraction and competition between parking lots and trip modes, 2 - the utilization and user composition of the parking lots. By inducing two numerical examples, the conclusions are that 1 - managers can achieve maximum profit and optimal allocation through price adjustment and quantity control; 2 - publicity (system cost minimization) and profitability (profit maximization) are consistent under certain threshold conditions; 3 - competition exists between parking lots as well as trip modes; some parking lots are even in short supply; profitable management does not create a market monopoly.