WIP Overview model structures of Khalid Saeed's 2014 WPI paper Jay
Forrester’s Disruptive Models of Economic Behavior See also General SD and Macroeconomics CLDs IM-168865
This model
shows the basic functioning and dynamics of a 'modern monetary system'.
The non-government
sectors, consisting of the private and foreign sectors initial y starts with
zero currency units. It is important to realize that after creating a new currency the government
must first spend currency units into the economy before they can be used:
without currency units the private sector could not even pay taxes! A government
that has its own freely floating currency can create a much money as it wants.
It does not need tax receipts to finance its spending, and any money it spends into
the economy above that collected in taxes represents income for the private
sector. The model show that the government initially created 9 trillion money units,
but spent only six trillion into the economy. The six trillion showed up as a government
deficit, but also as wealth in the non-government sector.
Since the government
can create as many money units as it wishes and transfer them to
the private sector to ensure an adequate
level of demand in the in the economy, austerity is unnecessary: money is available,
though real resource may be scarce. This also shows that the government can
contribute actively towards the creation of prosperity.
Please note that this model was originally
created by Gene Bellinger, IM 3206, from which this version was cloned.
Sectoral balances are relationships among money flows during an accounting period. Where we perceive accumulations of past imbalances to be accrued is another matter....
Sectoral balances are relationships among money flows during an accounting period. Where we perceive accumulations of past imbalances to be accrued is another matter....
Implementation of a DSGE Model solved in a Macroeconomics class by Harald Uhlig (link), using Rational Expectations, in this case, the Hansens Real Business Cycle Model.
It shows the capacity of implementing Dynamic Stochastic General Equilibrium Model Analysis using System Dynamics.
WIP of Rammelt's 2019 System Dynamics Review Article which has STELLA and Minsky software versions as supplements. Compare with the older IM-2011 version
Unfortunately, this model only produces the illusion of functioning, but I did manage to get it to give me the graph. However, because of the use of flows, if you change the time step to and the simulation length to anything other than the same numbers, you'll find the graph showing something that looks more exponential. This is due to the function referencing itself in regards to time, so inevitably each time consumption grows it changes the outcome on the other side of the equation. Still, this is a convincing mock up. I added a "45 degree" line so that one could conceivably see (and also change) the difference made by altering the level of autonomous consumption.
Partial exposition of Samuelson's Accelerator Model to conform with the Simple Model 7.3 in the Macroeconomics Book, based on MIT D memo D-1761 by Low and Mass 1973 See also more complete version IM-177550
From Bill Mitchell and Warren Mosler December2018 billy blog entry and mosler's MMT white paper (google docs) 2019. Some highly aggregated stocks and flows and boundaries introduced.
WIP of Rammelt's 2019 System Dynamics Review Article which has STELLA and Minsky software versions as supplements. Compare with the older IM-2011 version
Causal loop representations of macroeconomics taken from the System Dynamics literature contrasted with Forrester's main analysis of social and business organization layers See also Saeed's Forrester Econoics IM-183285
Map of SD work on Samuelson's 1939 model of the business cycle. See also D-memo D-2311-2 Gilbert Low 1976 and IM-165713. An alernative to the Ch 26 Macroeconomics textbook exposition. From Gil Low's Multiplier Accelerator Model of Business Cycles, Ch 4 of Elements of the System Dynamics Method Book edited by Jorgen Randers 1976 (MIT Press) and 1980 (Productivity Press)
