the knock-on effects compounding the matter further is the overly simplistic view that a 10% tariff placed on us$200bn of trade would only deal the economy a us$20bn hit. in reality, it is a much bigger hit, as not only will tariffs spill over into us prices, but ultimately, if a trade war goes on long enough, the allocation of capital and resources will start to become inefficient. if the us is better equipped to build aircraft and china is better equipped to build motor vehicles, then there is a comparative advantage in trade. by letting those who are more efficient at building something build it, everyone’s living standards are raised. this is the basic principle of global trade and its premise. the other point that the us may be missing is that by applying tariffs on the world, the rest of the world may end up trading more freely among themselves, leaving the us to be the odd man out. this is already happening, as evidenced by the recent europe-japan trade deal. under this scenario, the us loses while everyone else gains. irrespective of the timing around the next us recession, a global trade war will only make it come a little quicker while also potentially making it a little deeper. the trump administration would be well advised to welcome the impending chinese delegation and seek out the middle ground. building walls instead of bridges a slightly longer-term yet equally concerning issue is that of the us’ immigration policies. one of the key constraints in the us today is a declining labour force, which could materially hamper the country’s long-term economic progress. the reasons for the declining labour force include an ageing population, declining fertility rates and reduced net immigration. beyond enticing baby boomers back to work, not much can be done about ageing populations. while education can play an important role in improving productivity and output, adopting progressive immigration policies could address one of the most critical components − reduced net immigration. immigration is an extremely emotive topic, with many different angles from which to broach the subject. looking at the facts, immigrants have contributed towards more irrespective of the timing around the next us recession, a global trade war will only make it come a little quicker while also potentially making it a little deeper. than half of the growth of the us labour force over the past two decades. many of these immigrants are entrepreneurs who have brought a high level of innovation to the country. according to the national venture capital association, a third of us venture-backed companies that went public between 2006 and 2012 had at least one immigrant founder, with more than half of the us’ unicorns1 having been founded by immigrants. the importance of immigrants to the us is nowhere more evident than the statistic indicating that while immigrants make up about 15% of the total labour force, they comprise a quarter of the country’s entrepreneurs. companies such as google, tesla, ebay, yahoo, at&t, procter & gamble and 1 a unicorn is defined as a start-up business with a value of more than us$1 billion. pfizer all count an immigrant as either their founder or co-founder. against this backdrop, the formal proposal issued by the trump administration to rescind the international entrepreneur rule (ier), a regulation that allows entrepreneurs to grow and scale their businesses in the us, comes across as irrational and ill- conceived. the ier was enacted to allow more entrepreneurs to immigrate to the us to start their businesses, and while not perfect, removing it all together will have material negative long-term effects on us economic growth. in 2017, the new american economy immigration coalition estimated that the ier would create a minimum of 135 000 jobs in the us over the next decade, with the potential to create more than 300 000. the jobs that the us loses by preventing the founder of the next big company from staying in the us through the ier will not disappear; rather, they will go to another country. again, this is already happening. according to the kpmg venture pulse q4 2017 publication, since the beginning of 2010, global venture capital investment has increased fourfold, yet the share invested in us companies has decreased from around 70% to 51%. unsurprisingly, the big winner of this trend is china. a change in strategy the trump administration’s focus on making america great again is ill placed. if the us wants to maintain its state of global hegemony into the foreseeable future, closing its borders to global trade in both goods and people is not the way to go about it. keeping its borders open and remaining globally connected is a far superior strategy that will enable future economic progress while also ensuring that america remains great. 7