why do we need to use an index?
for changing expenditures,price or quantities?
if so,what variables should we use for the index,
cause it's not practical to use all variables?how do we choose which variables to use?
should we use a base weighted or a current weighted index?
if we're using a base weighted index,which base should we use/choose?
how often should we update the base?
what data to use?how often should we update and collect the data?
what are the time and costs taken to acquire the data?
if we have price and quantity data,should we use laspeyre,paache's or ideal index?
irvingfisher?
should we deflate the index?