1. Introduction
The reform of the iron ore resource tax is an important measure for China to comprehensively deepen the reform of the fiscal and tax system, and is the concrete implementation of the development strategy of energy conservation and environmental protection [
1]. The iron ore resource tax will be levied on a volume basis, which will lead to the disconnection between the tax and the price of iron ore resource products, and will not play its due role in the structural adjustment, technological upgrading, and innovation incentives of the whole industry. Therefore, the reform of the iron ore resource tax is very important for environmental protection and economic development.
China’s iron ore resource tax is not conducive to the protection of the environment under the “volume-based tax” mode. There is a large gap between the grade of raw ore, sales price, and production technology in different regions [
2]. The tax method based on quantity cuts the link between price and tax. There is no standardized and unified tax standard in the process of iron ore resource tax, which is likely to reflect the value of the resource itself and the principle of resource scarcity. The production capacity of different iron ore enterprises is uneven. Many small and medium-sized enterprises still have a lot of income and profits in years when the iron ore price is soaring and the resource tax rate is not high. They continue to produce iron concentrate powder, which is a huge hazard to the environment and resources [
3]. At the same time, this tax method has no incentive effect on those enterprises that actively invest in their own enterprise innovation and improve the efficiency of iron ore resource utilization. Therefore, China’s iron ore resource tax “based on quantity” has not been able to effectively regulate the iron ore industry. Therefore, it is necessary to explore the establishment of an effective iron ore resource tax collection mechanism, to regulate the relationship between economic development, environmental protection, and resource conservation.
2. Literature Review
The formulation and transformation of China’s resource tax policy has gone through five stages: blank period, ad valorem period, reform pilot period, and comprehensive ad valorem period [
4]. The function of the iron ore resource tax should be, to solve the negative externalities and promote the sustainable use of resources, rather than to regulate the differential income [
5]. As for the importance of resource tax, many studies have constructed CGE models to conclude that economic losses caused by environmental pollution account for 12.86% of GDP, indicating that more than a tenth of China’s GDP is generated at the cost of the consumption of resources and the environment [
6]. China’s imposition of an iron ore resource tax is conducive to the rational development and use of resources, and is very important for adjusting the contradictions and conflicts between China’s environment and economy [
7]. The collection of iron ore resource tax is a way of environmental supervision, and plays an important role in the improvement of green all-factor energy efficiency [
8]. At present, China’s iron ore resource tax is not reasonable. The regulatory role of the iron ore resource tax itself has gradually become weak. The legal system of the iron ore resource tax needs to be changed [
9]. The early reform of the resource tax had a certain negative impact on enterprises and consumers in the resource industry, but in the long-term development, the reform of the iron ore resource tax will reduce predatory resource exploitation and improve the efficiency of enterprises in exploiting iron ore resources [
10]. Since China’s resource tax and other taxes will affect the comprehensive tax burdens of enterprises, in order to adjust the comprehensive tax burdens of enterprises, and encourage enterprises to save energy and reduce emissions, we should carry out the reform of resource tax ad valorem [
11]. In order to give full play to the role of resource tax in saving resources, protecting the environment, and increasing fiscal revenue, China has gradually promoted the pilot work of resource tax from quantity to ad valorem [
12].
In terms of the effect of its iron ore resource tax reform, China’s resource tax reform will have a certain impact on enterprises and consumers [
13]. At the same time, the reform of China’s iron ore resource tax should adapt to the comprehensive environmental supervision, take the improvement of the market mechanism as the core, adjust and optimize the allocation of resources, and make the price of mineral resources truly reflect their scarcity [
14]. The reform of resource tax has increased the comprehensive tax burdens of enterprises in a short time, but in the long run, the comprehensive tax burdens of expert enterprises will gradually decrease with the enterprise tax burdens [
15,
16]. The reform of resource tax has increased the burden of resource tax, so it urges enterprises to improve the efficiency of resource utilization without changing the production efficiency, thus achieving the purpose of saving resources and protecting the environment [
17,
18,
19].
In view of the future direction of China’s iron ore resource tax reform, the government should encourage the development of innovative technologies for resource utilization through preferential tax policies [
20]. Expanding the scope of resource tax collection can improve the green tax system, which is in line with the concept of green development in the new era [
21]. China’s iron ore resource tax legislation should take expanding the scope of taxation as the core, and fully reflect the new development concept and the legal spirit of taxation in the tax rate, tax items, tax links, tax basis, and tax preference design [
22]. Whether the function of the iron ore resource tax should be to regulate differential income or to solve externalities, clarifying this fundamental problem is the key to get out of the iron ore resource tax dilemma [
23]. To reflect the scarcity of iron ore resources and the externalities of mining, the tax rate of iron ore resources should be different according to the reserves of different resources [
24]. Other studies have shown that resource tax reform can reduce carbon emissions and increase employment in the medium and long term [
25].
Many scholars have discussed the important role of China’s iron ore resource tax and the relationship between the iron ore resource tax and the environmental supervision system, but there is still a gap in the research on the policy effect of China’s iron ore resource tax collection reform. This paper summarizes the policy orientation of China’s iron ore resource tax from “volume-based” to “ad valorem”, and analyzes the impact of policy changes on enterprises’ tax burdens, industrial pollutant emissions, production technology innovation and upgrading, and the number of large and medium-sized industrial enterprises after the reform of the iron ore resource tax. At the same time, this paper demonstrates the environmental and economic effects of the reform of China’s iron ore enterprise resource tax collection mode, and puts forward specific measures to establish an effective iron ore resource tax collection mechanism in China, so as to adjust the relationship between economic development, environmental protection, and resource conservation, and lay the foundation for China to achieve the goal of carbon peak and carbon neutrality, and the reform of the ecological civilization system.
4. Analysis of Empirical Results
On the basis of the time fixed effect and the regional fixed effect, we evaluated the policy effect of the iron ore industry resource tax reform from four different dimensions: the government’s resource tax revenue, industrial pollution emissions, input–output ratio, and the number of industrial enterprises. The regression results are shown in
Table 3.
Models (1), (3), (5), and (7) are regression results that only consider the time effect and regional effect, without considering control variables; models (2), (4), (6), and (8) are regression results considering control variables, time effects, and regional effects. Comparing the results between the two, we can find that the goodness of fit of the model is significantly improved after adding the control variables.
Model (2) is the regression result of the iron ore resource tax reform on the government’s fiscal revenue. From the perspective of the significance of the regression, the core explanatory variable, DID, is significantly positive at the level of 5%, indicating that the reform of the iron ore industry resource tax can effectively improve the financial revenue. This is because the “ad valorem tax” could optimize the allocation of natural resources, adjust the income of enterprises, and improve the income of enterprises. When the income and profit of enterprises increase, the tax intensity will also increase, which makes the income and profit of iron ore enterprises match the tax, and brings about the increase of financial revenue.
Model (4) is the regression result of iron ore industry resource tax reform on pollution emissions. In terms of the significance of the results, the core explanatory variable DID is not significant, indicating that the reform of the iron ore industry resource tax has no significant impact on the pollution emissions of industrial enterprises. From the perspective of the mechanism, by properly increasing the tax burden of enterprises, enterprises are encouraged to abandon the predatory mining and extensive production methods of the past, and the effect of reducing the emission of environmental pollution is not significant. This may be caused by exogenous factors, which will be further discussed below.
Model (6) is the regression result of iron ore industry resource tax reform on enterprise production technology. From the perspective of the significance of the results, the core explanatory variable DID is significantly positive, at the level of 5%, indicating that the iron ore industry resource tax has a relatively significant improvement effect on the production technology of enterprises. From the perspective of the mechanism, the reform of iron ore resource tax will force the input–output ratio of iron ore enterprises to increase, thus improving the mining rate and energy utilization rate of iron ore, and significantly improving the production technology and resource utilization rate of the enterprises themselves.
Model (8) is the regression result of the industrial resource tax reform of iron ore enterprises on the number of large and medium-sized industrial enterprises. From the significance of the results, the core explanatory variable DID is significantly positive at the level of 5%, indicating that the reform of the iron ore industry resource tax is more beneficial to the development of large and medium-sized industrial enterprises. For large and medium-sized iron ore enterprises, their equipment and production technology are advanced, and their production costs are lower than those of other competitors. However, for small and medium-sized iron ore enterprises, ad valorem taxation is likely to transform the enterprise from profit-making to loss-making, creating opportunities for the establishment of large and medium-sized iron ore enterprises and the expansion of their own scale. Therefore, the reform of resource tax will increase the number of large and medium-sized industrial enterprises.
Through comprehensive comparative analysis of the results in
Table 3, we can see that Hypotheses 1, 3, and 4 have been tested and confirmed, but Hypothesis 2 does not meet our expectations, and further research is needed.
The regression results show that the regression direction of Hypothesis 2 (iron ore resource tax reform can effectively reduce industrial pollution emissions) is in line with our expectations, but the results obtained are not significant. After consulting the data, we believe that the policy effect of the newly promulgated Environmental Protection Law of the People’s Republic of China (the most stringent environmental protection law) in 2015, has had a great exogenous impact on the results of this experiment. Therefore, further research will be carried out, taking the amount of environmental pollution as the explanatory variable and the implementation time of the policy of the Environmental Protection Law of the People’s Republic of China as the explanatory variable, to explore whether the emission of industrial pollution in each province has significant changes before and after the implementation of the policy of the Environmental Protection Law of the People’s Republic of China, so as to explore the extent of its impact on the emission of industrial pollution [
49]. See
Table 4 for the specific regression results.
The above is the regression result of the impact of the implementation of the Environmental Protection Law of the People’s Republic of China on industrial pollution emissions. From the significance of the results, the time of the core explanatory variable is significant at the level of 1%, indicating that it has a very significant impact on industrial pollution emissions. In terms of the direction of action, the core explanatory variable time (post) is negative, indicating that the implementation of the Environmental Protection Law of the People’s Republic of China had an obvious inhibitory effect on industrial pollution emissions. This is in line with our previous speculation, so this paper speculates that hypothesis 2 is correct, but the results are not significant, which is likely due to the external impact of the implementation of the Environmental Protection Law of the People’s Republic of China on industrial pollution emissions [
3].
6. Conclusions
Based on the balanced panel data of 16 provinces in China from 2011 to 2019, this study estimated the impact of iron ore resource tax reform on the government’s resource tax revenue, industrial pollution emissions, enterprise production technology, and the number of large and medium-sized industrial enterprises, using the method of double difference, which better solved the endogenous problems that were difficult to deal with in previous studies. The empirical results show that:
- (1)
The reform of iron ore resource tax has a relatively significant role in increasing the government’s resource tax revenue, and the resource tax revenue of the treatment group is 58.6% higher than that of the control group on average.
- (2)
The reform of iron ore resource tax has a restraining effect on industrial pollution emissions, but the actual effect is not significant.
- (3)
The reform of iron ore resource tax can significantly stimulate enterprises to carry out the transformation of production technology. The input–output ratio of the treatment group is 0.923 higher than that of the control group on average, which shows that the reform of iron ore resource tax can significantly improve the production capacity of enterprises, promote resource conservation, and reduce environmental pollution [
52].
- (4)
The reform of iron ore resource tax can effectively increase the number of large and medium-sized industrial enterprises. The average number of the treatment group is 456.6 higher than that of the control group. This shows that the reform of iron ore resource tax can effectively increase the number of large and medium-sized industrial enterprises, eliminate some small and medium-sized enterprises with high energy consumption, high pollution, and out-dated production technology, and make the iron ore industry more standardized [
53]. It can be seen that the change of iron ore resource tax from quantity to ad valorem is indeed conducive to the effective use of China’s resources, and can better transform resources into China’s fiscal revenue. At the same time, the reform of iron ore resource tax can rely on tax and the market to regulate enterprises and eliminate small and medium-sized iron ore enterprises with high costs, high energy consumption, and high pollution [
54]. On the one hand, it can promote the innovation of production technology of iron ore enterprises by raising the tax rate, pave the way for realizing the combination of iron ore enterprises’ advantageous resources, and expanding the average scale of iron ore enterprises, while at the same time, it can adjust the production scale of iron ore enterprises to a certain extent, so the purpose of reducing industrial pollution emissions is achieved.
However, after the reform of the tax system, the transition from “tax based on quantity” to “tax based on price” has also brought some new problems to the tax system. Many enterprises can still evade the payment of resources in some ways [
55]. These enterprises mainly evade tax in two ways. First, in the daily sales and management of iron ore enterprises, for customers who do not need sales invoices to conduct cash transactions, the sales revenue is not as good as the account or part of the account. For some customers, who do not attach importance to sales invoices, the sales revenue on the bill is reduced in the process of invoicing, to reduce the tax paid. Secondly, in the process of development and utilization of mineral resources, there is a link of dividing ore into usable ore and waste rock and waste ore [
56]. Some enterprises divide the available ore into waste rock and waste ore for low-price sales. Such enterprises tend to deliberately exaggerate the amount of waste rock and waste ore in order to reduce the sales revenue on the account, not due to technical mistakes, and avoid paying the resource tax through this wrong division. Due to the complexity of the mining enterprise itself, it is difficult for the tax and financial department to find out whether the enterprise has concealed the tax evasion from the sales unit price and the enterprise’s account [
57]. The government should strengthen market supervision and the formulation of laws and regulations, and reduce the occurrence of the above two kinds of tax evasion by strengthening the supervision of the daily transaction flow of iron ore enterprises and the division of ore links [
58]. Even in some cases, we can cooperate with other departments, such as the land department and the power department. These departments often have data such as the amount of minerals mined, the grade of minerals, and the electricity consumption for mining mineral resources, from which can be inferred the authenticity and reliability of the enterprise’s book data. When formulating relevant legislation, the government should increase the punishment of iron ore enterprises that conceal their own income, increase the importance of enterprises to social benefits, and let enterprises improve their own business structure and establish modern sustainable development enterprises, while establishing the development concept of integrating economic benefits and social benefits.