econ-ark / darkolo Goto Github PK

The Life Cycle model from these notes:
https://llorracc.github.io/SolvingMicroDSOPs/

Can be solved with HARK.
In principle, it can be solved in Dolo.

This implicates this question of dolo syntax:
EconForge/dolo.py#208

A dolo version of this is what's needed to investigate if dolo's method of representing this would be satisfactory to CDC.

correct .py file from ipynb if it has not already been done for work for #22

Error in BufferStock python code.

I'm getting this error both when running:

$ ipython BufferStock.py

and when runnign
$ jupytext --to notebook BufferStock.py and then opening the notebook with Jupyter.

In cell 5, # Set a maximum value of the market resources ratio m for use in both models

---------------------------------------------------------------------------
IndexError                                Traceback (most recent call last)
<ipython-input-5-e81ae8575e02> in <module>
      5 
      6 # Obtain the decision rule by time iteration
----> 7 dr = time_iteration(model_dolo,tol=1e-08,verbose=True)

~/projects/econ-ark/dolo/dolo/algos/time_iteration.py in time_iteration(model, dr0, dprocess, with_complementarities, verbose, grid, maxit, inner_maxit, tol, hook, details)
     84     n_s = len(model.symbols['states'])
     85 
---> 86     endo_grid = model.get_grid(**grid)
     87 
     88     exo_grid = dprocess.grid

~/projects/econ-ark/dolo/dolo/compiler/model.py in get_grid(self)
    190         # determine bounds:
    191         domain = self.get_domain()
--> 192         min = domain.min
    193         max = domain.max
    194 

~/projects/econ-ark/dolo/dolo/compiler/objects.py in min(self)
     27     @property
     28     def min(self):
---> 29         return np.array([self[e][0] for e in self.states])
     30 
     31     @property

~/projects/econ-ark/dolo/dolo/compiler/objects.py in <listcomp>(.0)
     27     @property
     28     def min(self):
---> 29         return np.array([self[e][0] for e in self.states])
     30 
     31     @property

IndexError: too many indices for array

Originally from #14

Add to the BST chimera a python script that generates the object created by the dolang compiler when it parses the BST YAML.

Improvements to the BufferStock DARKolo:

• Commit modifications made at NumFOCUS summit
• Explain each part of the dolang model
• Bring the section on "Upper and Lower Limits of the Marginal Propensity to Consume" from the BufferStock REMARK into this DARKolo
• Look for other parts of the BufferStock REMARK that correspond to the dolang model

This completes the BufferStock section of this issue:
econ-ark/HARK#414

A chimera for the PerfectForesight model, "almost the simplest consumption model".

Currently uses older version of HARK

We should have a clickable link for launching the qModel notebook, as for example in the README at

https://github.com/econ-ark/DemARK

@Mv77

(from econ-ark/HARK#414 )

@sbenthall , @albop

I've been thinking about the practicalities of how we might keep track of functions of arbitrary numbers of discrete and continuous dimensions, and wanted to make a proposal intended to start a conversation on that subject.

https://github.com/econ-ark/DARKolo/blob/master/development/Representing_Multidimensional_Discrete-Continuous.ipynb

This is not meant as a concrete proposal, more as just an initial set of thoughts meant to provoke a discussion.

From @llorracc

A high priority from my point of view is working out an expanded Dolo/DolARK syntax so that we can capture:

1. "Cycles" in which the agents solve a different problem in each subperiod
2. Finite Horizons specification of the SolvingMicroDSOPs life cycle model that has age-varying magnitudes of transitory and permanent shocks, income growth, and other inputs
3. "Absolute time" A way to make reference to some absolute time (like, what year is it, in addition to what age am I). This is much less important, and if hard to do could be dropped
4. Conventions for how to keep track of agents who are "ex-ante" heterogeneous so that we can develop tools for handling such populations efficiently.

We should probably move a summary of this discussion to GitHub so it will be easy to track down in the future when we need to reference it.

Based on this:

• https://github.com/econ-ark/DemARK/blob/master/notebooks/KinkedRconsumerType.ipynb or

See: econ-ark/HARK#414

Using KrusellSmith REMARK: econ-ark/REMARK#17

Make a DARKolo chimera.

Bufferstock DARKolo model is not printing the dolo version into rendered LaTeX in notebook in Seb's local setup.

Aiyagari '94 model

CDC students are working on this already for getting into HARK.
Dolark ?? …

(from econ-ark/HARK#414 )

@llorracc I'm confused about the parameterization of the buffer stock model here.

The original paper, and the REMARK, both explicitly model unemployment shocks.

This chimera notebook says "The unemployment (zero-income event) shocks are turned off". This is consistent with the equations given but not consistent with the parameters given in the first table or in the HARK model code, which still have the 𝚄𝚗𝚎𝚖𝚙𝙿𝚛𝚋 and 𝙸𝚗𝚌𝚄𝚗𝚎𝚖𝚙 variables.

There is also a note that "An explicit liqudity constraint is added (ct≤mtct≤mt); that is, the consumer is prohibited from borrowing". But I don't believe this constraint is written into the equations above this line.

My reading is that the "For the purposes of this notebook..." section is meant to override what comes prior to it and was perhaps added without editing other code brought in from other sources. But I wanted to double check that I understood the intended model before making edits accordingly and bringing in simulation code.

It redirects to main page.