In a rare act of bipartisanship, the United States Congress recently passed legislation to encourage more inward foreign direct investment. Democrats and Republicans agree that FDI, or "insourcing,” is important to US jobs and competitiveness. They are right.But, even as they propose new measures to court foreign investors, many members of Congress in both parties harbor deep concerns about FDI from China, on both national-security and economic grounds. These concerns are unwarranted, and discriminatory policies to restrict such investment are ill-advised.The US government already has adequate controls in place to review and block FDI from all countries, including China, that pose anti-competitive and national-security risks. Investments that clear these controls benefit the US economy in numerous ways and should be welcomed.Foreign-owned firms in the US account for 5% of private-sector employment, 17% of manufacturing jobs, 21% of exports, 14% of research and development, and 17% of corporate-income taxes. Recognizing FDI’s significant contributions to the US economy, President Barack Obama’s Council on Jobs and Competitiveness endorsed the administration’s new Select USA program to coordinate government-wide efforts to promote it.To be sure, the US remains the world’s leading destination for FDI, accounting for 15% of global flows. But its share is declining, while China, using both carrots (like tax holidays and special enterprise zones) and sticks (like explicit and implicit local-content requirements) to attract foreign companies, has become the second-largest destination.China has remained a small source of FDI outflows, but that, too, is changing rapidly. Chinese outward FDI soared from an average of $3 billion per year before 2005 to $60 billion in 2010, catapulting China into the top five sources of FDI on a three-year moving-average basis. Given the size of China’s economy, its growth rate, and the experience of other developing economies, FDI from China is likely to increase by $1-2 trillion by 2020.An increase in FDI outflows is a priority in China for two reasons. First, China has an understandable interest in diversifying its substantial holdings of foreign-exchange reserves away from low-yielding US Treasuries to real productive assets with higher returns. That is why China established its sovereign-wealth fund, China Investment Corporation, and why CIC decision-makers are seeking more FDI opportunities.Second, China’s businesses have been encouraged to "go global” and invest abroad to find new markets, secure access to energy and raw materials, and enhance their competitiveness by acquiring new technologies, brands, and management skills. In a recent report, the People’s Bank of China urged Chinese companies to acquire foreign firms as the first stage of a ten-year plan to ease China’s capital-market restrictions – long a goal of US policymakers.So far, China’s FDI outflows have been concentrated in developing countries and a handful of resource-rich developed countries, including Australia and Canada, and have been aimed at facilitating trade and acquiring access to natural resources. But the patterns and destinations of China’s outward FDI will change as rising wages, an appreciating real exchange rate, and the entry of new suppliers from other emerging countries erode Chinese companies’ competitiveness, motivating them to invest abroad to upgrade their technology and management capabilities, find new growth opportunities, and move up the value chain.Currently, the US receives only about 2-3% of FDI flows from China. But China’s direct investments in the US have increased rapidly, from less than $1 billion annually in 2003-2008 to more than $5 billion per year in 2010-2011. At least 38 US states now host FDI projects from China, and competition for Chinese investment has intensified as states’ budgets have contracted.Of course, alongside the potential economic benefits of attracting a much larger share of Chinese FDI, legitimate competitive and national-security concerns do need to be addressed. First, like all mergers and acquisitions involving both domestic and foreign investors, investments in or acquisitions of US companies by Chinese companies, whether state-owned or private, must be evaluated by the US Justice Department for their impact on market competition. Investments with significant anti-competitive effects must be modified or blocked.Second, the Committee on Foreign Investment in the United States (CFIUS) must screen investments in or acquisitions of US companies by foreign companies, including Chinese companies, for national-security risks. Such screening is a common and justifiable practice around the world. In recent years, CFIUS has defined national security broadly to encompass not only defense activities and dual-use technologies, but also critical infrastructure, including telecommunications, energy, and transport – areas of particular interest to Chinese companies.Many Chinese investors view the CFIUS screening process as protectionist and targeted at them, but there is no evidence of this. The United Kingdom, Canada, France, and Israel accounted for more than half of all CFIUS cases reviewed in 2008-2010, while China accounted for only about 5%. Only a small fraction of Chinese FDI in the US is subject to CFIUS review, and most of these projects, like most reviewed by CFIUS, are approved, sometimes with mitigation measures. CFIUS does not review greenfield investments, which account for about 50% of Chinese FDI in the US. But Chinese FDI, especially in sensitive sectors like energy, does often trigger Congressional hearings, ad hoc resolutions, and calls for tougher CFIUS action. As a result of high-profile Congressional opposition, China’s state-owned energy company CNOOC withdrew its bid for Unocal, an American energy company, in 2005, before a CFIUS review that most likely would have cleared the deal on national-security grounds. China still points to this episode as evidence that Chinese FDI is not welcome in the US.Laura Tyson, a former chair of the US President's Council of Economic Advisers, is a professor at the Haas School of Business at the University of California, Berkeley.Copyright Project-Syndicate.org