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mmm final year of economics degree majoring in Finance & Economics.. i really should be able to do this,
Disclaimer.. my memory is poor, i rarely mention all the assumptions that have to be made, all the variables excluded etc, and this is overly simplistic .. mmm i take the last unit of macro in a few months
it depends on the ratio of imports to exports in the current account balance, but generally speaking the only people a depreciating currently disadvantages is those fat people who fly overseas on holidays (their money is worth less) .. otherwise it is very beneficial for exporters (more competitive, same product, yet able to sell cheaper), in addition more expensive imports will prop up the local competitors of such products, whcih provides an added boost to domestic economy .. mmm what else can i thin off
if the depreciation was either drastic, entirely unexpected, part of a long trend then the Reserve Bank could do a number of things, (as to why they'd care.. meh i , and their action in part would depend on whether the exchange rate was fully floated or semi, (I CAN"T FUCKEN FIND MY 2nd Year Macro textbook.. zzz), they could attempt to prop the exchange rate, it would use up large amounts of federal reserves, and the duration of this strategy is likely to be short, especially if its contrary to market forces (semi-floated scenario) .. fully floated, i doubt the reserve bank, in normal situations would intervene by playing around with the exchange rate, as as stated before depreciation is generally benenefical..
Reserve bank (monetary policy) could conduct open market operations (selling bonds) which raises the interest rate (yes there are steps in between.. but im too lazy), or government could undertake some nifty fiscal policy action, either could influence the exchange rate via interest rates, but again, wtf they'd do this?
higher interest rates lead to huge influx of foriegn capital (positive margin versus the rest of the world), consumers would likely increase their saving rate, investment would decrease in teh business sector, reduce in aggregate demand, assuming fixed rates of income, thereby lowered demand for money, which only slightly offsets foriegn capital inflow which causes an appreciation in the currency... MEHHHH i think i did it
elektrikal... do macro again 
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