Tuesday, July 17, 2012

manly macro rides his rat ex single jack ass around the ring

"start simple, understand the simple model, and then complicate"

good advice for knowledge seekers of all ages !

" start with a representative agent. "

whoops ...just one mr. manly ? ..keep reading voyageurs

------------------------- 
What about rat ex ?
"  may  seem like an extreme position. But the alternative is to assume
 we know what kind of mistakes agents will make. "

no the opposite is to assume heterogenious experience
and fragile  self morphing  "agent inner models"
" I’m sure different agents are using different models from the one I’m using, but I have no idea what these models are. "
so ? just that fact oughta steer u clear of a single agent assumption ...no ?
"To keep things simple, I therefore assume I do not know what mistakes they will make, which implies rational expectations."
that is as good an instance  of calling a damn fools leap a deductive inference
i've seen since the nixon white house fired 
 H R Haldeman 
" If I want to be more realistic, I can look at the huge mainstream literature on models of learning. It is not a field I know well, but if there is a message there that we should go back to assuming adaptive expectations, I have missed it. "
ya ya we are a learning species but why rat ex is better then adaptive as a proxy is far fom clear regardless of what the venality streaked
 "literature "presumes
 in its  self boasting ignorance and sponsored or at least rewarded
  limited liability aesopian  hunching  and just so story telling
---------------------------------------

questioning minds need  a  fancy washing

"why assume  a representative agent and  rational expectations. "?
"does this  inevitably lead to laissez-faire results. "?

 answers are left unstated don't u know

 good old fashion socratic humanist non washing mind framing

let the mere frame default the subject into a  pro market anti interventionist tilt

then hit em with an apple pie declarative :
"The ultimate test is empirical relevance of course"
" here's why I find thinking about a representative agent and rational expectations gives more plausible answers than using pre-microfoundations  analysis."
"I’ll keep things as simple as I can and leave out most caveats and qualifications."
in other words
here comes a  tap dance cover for a slow set up ....comrades

" what is the impact on output of a balanced budget increase in government spending in an open economy stuck at the zero lower bound (ZLB)? "
wow arch eli gandolf bob shillsters big hype
no deficit  turds left on the trail to recovery here
recovery ?
"Well the first thing we have to do is ask whether the increase is permanent or temporary. "

"If it’s permanent, if the import content of government spending is similar to consumer spending, and if taxes are lump sum, the answer is nothing."

can't forever tune up the system ala joe stigasaurus's 
 inter income class tax and transfer proposal
noticed  in a recent  post at 

inequality 2012 :

 http://inequality2012.blogspot.com/2012/07/three-cheers-for-joe-stiglitz.html


why ?

seems
" if  the tax increase is permanent"
 then consumption falls by the same amount "

bingo 
" no net impact on total  demand for domestic output"
the added government spending is  exactly displaced
by subtracted tax paying household spending

recall there is by construction just one immortal household here
kool eh ?

----------------------
post script :

manly adds " That is pretty obvious"
 just in case you were about to say to yourself
 "what the fuck ??   ...that's not obvious at all "
------------------------------------------------
to be sure he's put the kill shot in manly writes :
 "  anyone using a schlock keynesian  balanced budget multiplier model
 would get this wrong
since they would have assumed mpc<1 "

get it wrong ?


in reality or only in mainly nonsense-ville 
ie
 in  manly's stick figure ...anti june bug effect...console referencing...
    single agented.... ersatz gadget rigorous.... euler oiled ....
                                                                            kandy ass of a model  !

-----------------------
fortunately for his birth in heaven
our doc  manly is a middle pather
                                to the end
 sooooooooooo...
 after taking away slavation for us joblings
                         with one hand
he restores a piece of  the keynesian loaf  to us
                          with the other :

---------------------------------------------------
"however citizen savants "

" If the government spending increase is temporary
 so  that  the tax increase is also temporary.....
 our single  optimising consumer
   immediately gets us the result
  that we activists want "

"even though  the single consumer/single tax payer's
   consumption will initially fall
 it will fall by less than government spending will increase"

hence
" there is a short run net increase in demand. " !!!!!

fiscal action is at least effective
                             if not very efficient in Manlonia

 cause
"Higher demand raises output  and income".
and If  "inflation does not change
   we get a multiplier of  one"
errr so  long as there are  "no imports. " 

ie we get the schlock keynesian balanced budget multiplier
in a closed system ....

a short burst of temporary  surtax funded   
   increased government direct spending

---so long as the usual leakages  taxes and imports are nullified (by  construction)---

  will increase present period total  private output and employment
dollar for dollar ....no wall street horrors ..no "crowding out "

 we're able to pull ourselves out of the red
we don't have to wait for the corporates to resume "investment "
or borrow on our tree house
----------------------------------------------
speaking of leakages ...
now  lets up the complexity a notch
  lets  talk about a national  system
        that trades with other national systems :


"In an open economy, what will happen to the exchange rate
if we have a temporary balanced budget increase in government spending, lasting no longer than the period interest rates are stuck at zero."
" Everyone remembers their Mundell Fleming – under flexible exchange rates fiscal policy is ineffective, because the exchange rate appreciates to crowd out the additional demand."

clever move eh
here manly  raise an old fiscal activist bugaboo
 from   the early 60's 
the bob  mundell  stymie
from within  schlock  keynesianism's on version of is/lm modeling


saints alive


 " that is completely wrong inside  our rate ex single agent intertemporal model  RE-inter T - SA model  world"
the  bastards more progressive more job class friendly more fiscal  activist 
 for christ's sake then open schlock K
                                       not less progressive !

thanx to some asset  market magic :
 "  Agents in the foreign exchange markets will note that there is going to be no increase in long run interest rates and no change in the steady state (so no long run appreciation or depreciation), so there is no reason for the exchange rate to move in the short run either. "

"There is no crowding out through the exchange rate,
                so the analysis on the balanced budget effect
                                                                                  stands."

oh manly
          god loves you

you  fuzzy   little professor  of a son of a gun 
      cause
"  the representative intertemporal consumer and rational expectations model
       gives better more job class enhancing " answers"
  than that old stand by MF is/lm schlock keynesian modified hicks model"

--------------------------------------------------
moving beyond simple feel good :
" to complicate in various ways here
   means building on this analysis  rather than overturning it. "


my lord
a second fool's leap of epic stature in the same post
i should think doc
  the first step  out into high complexity
 might  be
 removing the  single agency construction spec

so isn't that  conceptually half the model gone ....eh ?

at any rate  see the sunny side here ?

 a single agent micro con founded intertemporal macro model
    isn't necessarily anti fiscal intervention

  why this just so story
  tells us
  that shillmeister's
beloved balanced budget fiscal expansion
just might work as advertised ....in a closed system
with probably lump some  tax rates
                         and operating " at the ZLB"