The study has been published in the September issue of the Journal of Health Economics.
The survey also found that less than 15 percent of those concerned with relocation are considering "reshoring" -- bringing production back home.
The study — "By the Numbers: Jeopardizing the National Benefits of Trade through America's Busiest Port Complex" — is based on international trade moving through the adjacent San Pedro ports of Los Angeles and Long Beach, the country's largest container port complex.
The system is utilized in most of the domestic factories operated by Apple supplier, Foxconn.
The study also found out that many businesses focused on local specialty snacks are transforming to fast-food businesses to adapt to people's fast living pace.
The study found that all Chinese mainland institutions either improved or maintained their previous ranking position. One of the nation's top performers was the University of Science and Technology of China, which climbed seven places to 99th.
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The successful issuance of UnionPay credit card will surely facilitate international transactions and open up new business opportunities, he added.
The study, published Wednesday in The Lancet Psychiatry journal, analyzed responses from a large sample of 1.2 million American adults who participated in a survey conducted by the Centers for Disease Control and Prevention in 2011, 2013 and 2015.
The tariff adjustments will help reduce import costs and facilitate opening-up as well as the sharing of development achievements with other countries and regions, it said.
The suspect is 50-year-old Amor Ftouhi, who entered the US on June 16, FBI special investigator David Gelios told a televised press conference in Flint, Michigan State.