The concept of rent-seeking was first developed by Tullock [
11], while the precise term was suggested by Krueger [
12]. Economic rent was discussed by Posner under the monopoly and governmental regulation view [
13]. The rent-seeking theory holds that power owners set and use policies to restrict market supply, and thus they create scarcity in order to gain unproductive profits (so called economic rent). Individuals then exploit their privileges, and (legally or illegally) search for and occupy these economic rents (rent-seeking) [
12]. Most discussions about rent-seeking theory were based on angles that governments used of public power to set or seek rent, or based on governmental rent-setting, interest groups bribery, and public power corruption. Most research suggest that paying well eliminates corruption and punishment on government public power rent-seeking. However, the purpose of e-hailing’s entry into China’s taxi industry was to introducing competition and to improving the travel efficiency of citizens. Therefore, it is doubtful that government rent-seeking and collusion is present here. It is obvious that traditional rent-seeking theory has its limitations in studying China’s contemporary taxi industry. The phenomena such as red-pack and subsidy wars, price wars, taxi strikes and cross-platform order taking cannot be explained by traditional rent-seeking theory. This paper tries to explain these problems from the angle of the extrusion of government public power by the capital power of Internet enterprises.
3.1. Rent-Seeking Behavior of E-Hailing Platform Enterprises
Most rent-seeking research is based on the premise that the government holds the public power to carry out rent-seeking activities. Those studies also assume that enterprises gain profit by maintaining monopoly. A government stands for the agency of the public. The government’s rent-seeking behavior jeopardizes the public interest. Property dilution theory [
14] holds that the private property of citizens is not always private, because when citizens are engaged in social activities, private property is always partially placed in the public domain to form public property. As the agent of public interest, government agencies are entrusted by the public to manage public property.
In the car-hailing scene, the public will connect their own vehicles (private property) to the online taxi ordering platform for “sharing”, which corresponds to the idea of the public property from the property dilution theory. As an agent, enterprises on the ride-hailing platform directly participate in the resource allocation activities of public property by providing platform information interactive services. The government is in the position to supervise the competition and cooperation mechanism between e-hailing enterprises and traditional taxi enterprises. Due to the nature of the state-owned capital of traditional taxi companies, governments naturally impose more regulations on traditional taxi companies. However, e-hailing platform enterprises are mostly private owned companies. The shareholders may consist of multiple venture capital investors. The taxi service is a fundamental operation that carries out other commercial purposes. The enterprise’s strategic and business objectives are plural. It is difficult for the government to directly manage such enterprises.
Urban taxi drivers and passengers are regarded as independent rational economic individuals. Drivers perceive utility through their operating income. The number of car-hailing users in China reached 287 million in 2017, a growth rate of 27.5% compared with 2016 [
15]. Assuming that the total population base remains the same, the growth of e-hailing users must come from the traditional taxi user group and the illegal taxi user group. Since the increase in user size is a result of matching between the supply and demand sides, the growth of the community size of the users of e-hailing is bound to be accompanied by the synchronous growth of the community size of the car-hailing drivers. For the sake of simplification, it is assumed that the size of the black car market has been shrinking to a negligible state. For passengers, the network has the same purpose as the traditional taxi, which is to carry passengers from the place of departure to the destination. Thus, the utility objective function of the passenger is U = f(u1, u2), U represents the utility function value of the passenger, and U1 indicates the utility of traditional taxis for passengers (less travel time than public transportation), and U2 indicates that the e-hailing taxi is carrying the utility of a car to the passenger (less travel time than the public transport). Furthermore, it is assumed that, in general, a vehicle can carry passengers to the destination faster than the public transportation tools, and that the passengers save time from the same journey. This factor is x. It is found that the physical and functional properties of the traditional taxis and e-hailing are both cars, which can achieve the same effect for the passengers. The passenger’s utility function can be further expressed as U = f(u1(x), u2(x)). Assuming that passengers have disposable income at any time and that they can consider one of the two ways of choosing traditional taxis and networks, then at all times, the passenger’s choice is a budget constraint. When the total disposable income used for the consumption of traditional taxis is a units, and the total disposable income used for the consumption of e-hailing is b units, the budget constraint line can be expressed as: y = −(b/a)x + b. Corresponding to the (Q0, Q0) consumption mix, passengers’ consumption portfolio in this case, is shown in
Figure 2.
When the car-hailing platform enterprise implements the market strategy of red package and subsidy, it can be seen that the number of passengers consuming under a fixed budget increases; point b rises to the point b’, the passenger’s budget constraint is changed to y = −(b′/a)x + b′, and the new utility curve of the passengers is changed to U′ = f′(u1(x), u2(x)). The new optimum point corresponds to the consumption combination of (Q1, Q1), compared with the original Q0 (Q0). ⊿q = (q1 − q0) < 0 is the reduction of traditional taxi consumption which is affected by the policy of red pack and subsidy by e-hailing companies. ⊿Q = (Q1 − Q0) > 0 is an increase in e-hailing consumption stimulated by the red packets subsidy strategy of the platform (
Figure 3).
Therefore, there is a basic conclusion that the urban taxi market is affected by the “red packets subsidy war” by the Internet platform enterprises:
Proposition 1. As the red packet subsidy market strategy substantially increases the number of passengers under their given budgets, the passenger’s utility (indifference) curve has changed, and the passenger’s consumption preference is more inclined to e-hailing cars, and the new optimum combination is derived from the income effect and the substitution effect of the red packet subsidy strategy.
Why are passengers willing to take more e-hailings? For the passengers themselves as consumers, they are economically rational, and under the same budget and equal utility, they always tend to consume cheaper goods, and so do taxis.
The red packet and subsidy strategy in proposition 1 is only one of the factors. The second important factor is that there has been a significant change in the method of calling cars and settling fees. For example, e-hailing makes use of mobile equipment to access the Internet when it calls the idle vehicle resources. The efficiency of the call is improved. When the passenger uses their mobile equipment to pay the cost of the car, this avoids the risk of counterfeit cash payment, saves the time of payment, and improves the efficiency of the car driver’s receipt and increases order efficiency. Assuming that the time saving utility factor of the ordering and settlement method is y, and the passenger utility level function is U″ = f″(u1(x), u2(x,y)), u1 expresses the utility of traditional taxis for passengers, and u2 indicates that the e-hailing is carrying the utility of the passengers, and factor x indicates that the passenger uses a taxi to obtain the time consuming factors under the same way than the public transportation. Factor y expresses the time saving utility factor of the e-hailing and the settlement. Obviously, y is unique to e-hailing.
According to the principle of market clearing [
13], assuming that the actual price changes caused by the e-hailing subsidy, etc., can always quickly bring the supply and demand sides into a new equilibrium, then passengers in the new optimum combination (q1, Q1) will have a corresponding combination of supply in the taxi market. The change in the supply and demand sides of the e-hailing community is actually a combination of supply and demand changes. The red packet subsidy strategy of the online vehicle platform company targets both the car driver and passengers at the same time, resulting in an increase in the purchasing power of passengers. Thus, the demand curve moves to the outside. More private car owners become e-hailing car drivers, and the supply curve also moves to the outside. The supply curve and demand curve of the online car market moves to the outside at the same time, resulting in an increase in car hailing consumption increase in Q1–Q0 (as point Q0 moves to Q1). At the same time, the consumer price P1 may still be close to the original level, or even lower, due to the existence of red pack and subsidies (
Figure 4).
As a supplier, the increase in the number of e-hailing car drivers at the same time comes from the owners of private cars and traditional taxi drivers. Traditional taxi drivers use taxis (corporate assets) to engage in e-hailing operations, which is a type of free rider [
14] act, because traditional taxi drivers drive a taxi, and the means and goals of their income changes, the size of the traditional taxi community actually shrinks (
Figure 5).
Therefore, we have obtained the following basic conclusion about the relationship between supply and demand in the taxi market under the red pack and subsidy strategy:
Proposition 2. The red packet & subsidy strategy of the e-hailing platform company increases the number of passengers on the platform and the number of car drivers at the same time, that is, the scale of the ecological community of the e-hailing vehicles increases, which accompanies the shrinking of the ecological scale of traditional taxis.
The composition of the ecological community in China’s traditional taxi industry is diverse. Traditional taxis are cruising cars, and the ownership structure of cruising car companies is mostly state-owned or mixed, which lies directly under the supervision and assessment by the Ministry of Transport of the People’s Republic of China (PRC).
The shrinking of the ecological community of traditional taxis (cruising cars) has reduced the scope of supervision of the Ministry of Transport of PRC. The ownership structure of the e-hailing platform company is composed of multi-participant investors. The capital participates in public activities through such Internet platform enterprises. The influence of capital on public social activities expands with the expansion of the ecological community scale of the e-hailing vehicle. Under this premise, the public power in the Property Dilution Theory [
14]—the government, as an attorney of public property, experiences the unequal changes in the agency’s responsibilities and the agency scope. Even if its agency responsibilities remain unchanged, the scope has become smaller as the traditional taxi community shrinks. In the eco-community of the e-hailing, the Internet platform company has become the agent of public property, and the client is the public-private car owner. The venture capital behind platform companies is inherently profit seeking, and lacks active supervision of the public’s private property in the public domain. At the same time, the public’s personal supervision of the public power of platform companies has inherent innateness and a lack of regulatory means. The logic of collective behavior [
16,
17] believes that when management and incentives are carried out in large public groups, taking into account the principle of the economic rationality man, government supervision is carried out by natural persons, which will inevitably lead to free riders and moral risks. Venture capital investors also have this characteristic. As a result, it is concluded that the agency responsibility of the e-hailing platform company is:
Proposition 3. With the expansion of the size of the e-hailing community, the e-hailing vehicle platform enterprise has replaced the government’s supervisory responsibilities to a certain extent, while the venture capital investor, as a rational economic person, has a natural contradictions in its agency responsibility and its profit-seeking.
3.3. Capital Rent-Seeking and the Utility of Exercising Public Power
Although the capital and the government exist for different purposes and they have different essential meanings, the ways to obtain market status are also different. However, what the two have in common is that they may also seek benefits for themselves while shouldering the duties of public power.
Assume that the utility function of capital in the use of Internet platform companies (e.g., Internet car-hailing platform companies) to participate in public power is:
Uv is the utility of capital’s public power, α represents the use of platform companies and business models to disseminate benefits for themselves; β represents the benefits created by the use of platform companies and business models for public interests.
(∂Uv)/∂α > 0 represents the positive correlation between the benefits of the use of an Internet platform business and a business model for capital, and its own utility level. (∂Uv)/∂β < 0 represents the negative correlation between the benefits of the capital utilization of Internet platform companies and business models for the public and their own utility levels.
The expansion of the size of the community of users and drivers of e-hailing, and the reduction in the size of traditional taxi users and drivers heralds the success of capital rent-seeking and rent-setting. The utility function and balance between the supply and demand of users and drivers in the taxi ecological community are market responses to capital rent-seeking behavior. It is clear that the utility function of capital has also changed:
α′ > α indicates that the interest gained after capital rent seeking is higher than that before rent seeking; β′ < β indicates that the benefits to the public after capital rent seeking are less than those created before rent seeking. The interests of the Internet platform companies controlled by capital (such as the e-hailing platform company) create for themselves. There are both mutual benefits under cooperative games, and there are also public interest eliminations and capital gains under the zero-sum game.
β′ < β results in the mixed interest combination. It is difficult for the public to dismiss the capital (which representing e-hailing enterprises) even if it discovers that the exercise of its public power by the capital impairs the interests of the public (public information privacy, public information security). This is because at the time being, the public has widely accepted and recognized the benefits of the business model provided by the capital, and every individual in the public has different perceptions of the difference in interest of (β′-β). There is a steep increase in the likelihood that individuals will not be able to reach agreement.
Therefore, we reach the following conclusion about rent-seeking by capital utilizing platform companies:
Proposition 6. (Venture) Capital makes use of Internet platform companies to set rent and to create benefits for themselves. Because the capital of commercial companies lies between the government and the public, and it partly replaces the government’s public powers, the public creates capital for the public in accepting capital. While accepting the benefits created by capital, the public does not have the ability to strictly divide the boundaries of public interests that are damaged by capital. The public’s “force” to supervise the capital of enterprise representatives is dispersed.
When capital realizes that the “collaborative force” of the public over its supervision is weak, capital may increase its infringement on the public interest. It is natural that the government needs to supervise the capital behind the business model. Traditional research on rent-seeking behavior believes that high-paying eliminates corruption [
19,
20] is able to stimulate the government to provide better service to the public. Once the (venture) capital is between the government and the public and assumes the role of some public power, even if the high-paying eliminates corruption, the policy is for (venture) capital, and there is no practical value. The reason is that capital does not lack a “high salary”. High-level managers of Internet platform enterprises representing capital owners also do not lack “high salary”. Therefore, supervision has entered a “vacuum” at the level of such business organizations.