for the EU q i did thisGood= trade creation--> higher AD, blah blah blah all the usual growth arguments higher GDP per captia and better standards of living however --> net importers, increases competitiveness between eu member states a lot of which are more allocatively efficient and therefore we import their goods anyway--> leakage from the circular flow e.c.t but still we experience higher growth due to the market opening up to over 500 million consumers--> higher profit for uk firms --> dynamic efficiency improvements, encourages them to become more comparative/ improve statuc efficiecny--> consumers get lower prices e.c.t Migration--> good high skilled labour e.g. 53,000 EU migrants in our NHS--> working for a public merit good thats under provided in the free market, filling job spaces where UK workers lack specific skills - however migration= burden on public services, a lot of these migrants send their income back home= leakage from the circular flow of income, wasteful spending e.g. 350 million to brussels every year - though we get a lot of this back through the rebate anyway- opportunity cost incurred--> could be going into our own economy via public expenditure- we have little say over eu laws/regulations e.g. subsiding of the farmers through CAP that encourages inffieicny in that market and only benefits 1% of the UK labor force however EU= stability to both investors and businesses e.g. 540 billion pounds of investment alone last year - london is a big finance hub and our finance exports help keep our BOP payments some what level... so we need stability -FDI= good, injection into our cirular flow of income, helps our economy in the long run- leaving the EU could be bad as weve recently seen fears of the UK leaving has led to a fall in the value of the pounds= higher prices for consumers, and of course cost push inflation affecting both individuals and firmshad a few other arguments cant remember them all... ;