the impact of national governance capacity on foreign
capital inflow and outflow, which is divided into
three aspects: economy, politics, system and legal
environment (Globerman, 2002) Raj (2016)
established a comprehensive evaluation system to
study supply chain management decisions, analyzed
and ranked multiple decision-making processes with
entropy weight method and TOPSIS ranking method,
and selected the optimal decision (Raj, 2016, Kumar,
2016, Sharma, 2016). Hussain Jamal (2020)
conducted a comprehensive assessment of the
investment risks and natural resources of countries
along the “Belt and Road” through entropy weight-
TOPSIS ranking, and provided the minimum risk
recommendations for Chinese enterprises to invest
abroad. The results showed that Singapore, Malaysia,
Nepal, Bhutan, Russia, Armenia and the UAE are the
most suitable for Chinese companies to invest in
(Jamal, 2020, Zhou, 2020., Guo, 2020, Anwar, 2020).
This paper aims to be based on the economic
environment of some oil and gas countries, so the
selected indicators are the economic and
environmental indicators of countries rich in oil and
gas resources. Many scholars have also studied the
economic environment assessment of oil and gas
countries, but there is no unified evaluation system.
Wang Yue (2016) studied the investment
environment of oil and gas countries from nine
aspects such as economic environment (Wang, 2016).
He Bo et al. (2013) studied the integration of
economic environment and political environment
(He, 2013, An, 2013, Fang, 2013, Zhao, 2013, Ding,
2013). Liu Erhu (2018) divided it into four aspects:
political environment, economic environment,
infrastructure conditions and production factors (Liu,
2018, Chen, 2018).
Some scholars construct the evaluation index
system and select the evaluation model for
quantitative analysis, and the results are more
scientific. Wang Xinmin et al. (2015) used Theil
index to quantitatively study the investment
environment of major oil and gas countries (Wang,
2015, Liu, 2015, Sun, 2015). Li Yu et al. (2016)
constructed the index system through the Delphi
method, evaluated the investment environment from
six aspects, and divided the countries along the line
into four strategic countries: priority investment area,
key investment area, potential investment area and
risk area (Li, 2016, Zheng, 2016, Jin, 2016, Wang,
2016, Li, 2016, Zhao, 2016, Huang, 2016, Dong,
2016). Wang Yue (2016) one of the 9 level one
indicators and 58 two one indicators, one belt, one
road, the main oil and gas cooperation countries, and
the distribution of investment indicators (Wang,
2016). Wang Yaoqing and others (one) compare the
advantages one of the "one belt, one road" main
product from the perspective of the global industrial
chain (Wang, 2017, Tun, 2017, Sun, 2017). Liu Erhu
and Chen Ying (2018) used entropy weight method
to measure the impact of economy on the investment
environment of the five Central Asian countries (Liu,
2018, Chen, 2018). Li Youshu et al. (2019) used
entropy weight method to evaluate investment in
some energy countries, and used SE-DEA model and
Malmquist index method to evaluate investment
performance (Li, 2019, Li, 2019, Luo, 2019).
In the domestic research literature, scholars
mostly build the investment environment evaluation
indicators system to quantitatively evaluate the
investment environment of various countries, so as to
put forward corresponding investment suggestions.
Although the research method of constructing the
evaluation system is more scientific than the simple
qualitative research. However, the comprehensive
evaluation system is easy to be incomplete and omit
indicators, resulting in inconsistent evaluation system
and inconsistent research results. Therefore, this
paper only evaluates and forecasts the economic
environment to ensure the comprehensiveness of the
indicators. In order to ensure the objectivity of data
and results, the most objective research method
entropy weight TOPSIS method is selected.
The structure of this paper is as follows, the
second part is the Materials and Methods, the third
part is the results and discussion, and the fourth part
is the conclusions.
2 MATERIALS AND METHODS
2.1 Materials
According to the richness of oil and gas resources and
the availability of data, this paper finally selects 18
countries as the research objects. According to the
country guidelines of the Ministry of Commerce,
Kazakhstan, Turkmenistan and Uzbekistan belong to
Central Asia; Iran, Saudi Arabia, Kuwait, Qatar,
UAE, Oman and Egypt belong to West Asia and
North Africa; Indonesia, Malaysia, Thailand and
Vietnam belong to Southeast Asian countries; There
are also India, Russia, Pakistan and Azerbaijan, a
total of 18 countries.
The data used in this paper are from the foreign
guide of the world bank, the Ministry of Commerce
of China and the Wall Street Journal. The economic
environment is an important aspect that constitutes
the soft environment. The quality of a country's