求翻译：第四类研究主要集中于中国ODI的国际收支效应方面。戎建和苗瑞卿以美国为例进行研究，结果表明，对外直接投资并不总是构成母国资金的外流，甚至可以作为一种利用外资的手段，是不会造成国际收支失衡的。刘志伟、高利和陈刚利用1983～2004年的数据，对中国对外直接投资对国际收支的影响进行了实证分析，结果显示，中国的对外直接投资与国际收支余额不存在因果关系。是什么意思？

The fourth category of research has focused on the odi's international balance of payments effect. In the United States, the Rong Jianhe Tony Ruiqing results show that foreign direct investment does not always constitute the outflow of funds of the mother country, or even as a means of foreign capit

The type 4 research is focused on the China ODI effect the balance of payments. Informed consent, and Jui-ching Miller in the United States, for example, of the results of the study indicate that foreign direct investment, and does not always constitute a state of the brain, and even money can be us

Fourth research focused mainly on ODI's balance of payments effects in China. Rong Jian and Miao Ruiqing to United States case study, results showed that outflows of foreign direct investment does not always constitute a home country funds, and even can be used as a means of utilizing foreign invest