An economy produces a consumption good and also has a research sector which produces new ideas. Time is discrete and indexed by π‘ = 0, 1, 2, β¦
The production function for the consumption good is given by
$π_π‘ = π΄_π‘ πΏ_{π¦π‘}$
where, at time π‘, $πΏ_{π¦π‘}$ is the amount of consumption good produced, π΄π‘ is the stock of existing knowledge, and $πΏ_{π¦π‘}$ is the amount of labour devoted to production of consumption good. It is known that $π΄_0 = 1$.
The production function for new ideas is given by
$ π΄_{π‘+1} β π΄_π‘ = \frac{1}{250} π΄_π‘ $πΏ_{ππ‘}$
where πΏππ‘ is the amount of labour devoted to production of new ideas at time π‘. Suppose that for all π‘, $πΏ_{aπ‘}$ = 10 and $πΏ_{π¦π‘}$ = 90. Then, the growth rate of the consumption good ($Y_{π‘}$) at π‘ = 50 is _____ percent (in integer).