Open source code from Dr Paul Brewer and Economic & Financial Technology Consulting LLC

Welcome

This page exists to help people looking for open source software find what they need from me, quickly, and understand how the various libraries are related.

Economics

Agent-based Simulation of Market Exchange Trading and Scenarios from Microeconomics

These projects are libraries that can be assembled to form an agent-based market simulator with robot traders.

• market-engine
• market-example-contingent
• market-agents

An example simulator, supporting one market, built atop this code is at:

• single-market-robot-simulator

With plugins for additional functionality:

• single-market-robot-simulator-viz-plotly
• single-market-robot-simulator-savezip

A web front end is at

• robot-trading-webapp

which provides the example simulator app at http://drpaulbrewer.github.io/robot-trading-webapp

Game Theory Matrix-Game Prototype in MeteorJS for Human Subject Experiments

This is an early draft, and has scaling-up issues running for more than a few dozen subjects simultaneously.

• meteor-matrixgame
  

HAMP Loan Modification

HAMP is a somewhat controversial Obama administration program (a policy program, not a computer program) for adjusting the parameters of loans in imminent default with the cooperation of the lender. Other programs like HARP were created later to complement HAMP.

I ran an ad-free site for the public interest on HAMP Loan Modification calculations at https://www.armdisarm.com, netting about 20,000 visitors/year during the peak public interest in these policies in the early 2010s.

• Unofficial-Loan-Modification-HAMP Early version of unofficial HAMP Calculator code for armdisarm.com
• loan-modification-politics Correlation of HAMP Loan Application Outcomes and the 2008 Presidential Vote; supporting data for blog article on HAMP Approval Rate Analysis with Google Big Query at http://sunshineonacloudy.net/

Miscellaneous

Javascript NPM Libraries

• stepify-plotly Makes step charts on Plotly from line charts by scanning traces for .steps:1
• cumulative-distribution-function Creates empirical cumulative distribution function from point data
• positive-number-array Returns an array of positive numbers from string or array input
• transpluck Transposes CSV-like data to collection of columns and plucks desired data columns
• csv-file-creator Creates a .csv file on the browser from array-of-array data.
• find-zero-range Finds a line segment where a step function is zero, by bisection.
• partial-index Partial sorting of muti-property data

Prototypes

• multicoresql

Sharding of sqlite database and multi core processing of sqlite queries across collections of sqlite shards.

Examples/Utilities/Forks

• docker-stacks

Private fork of Jupyter project docker stacks to enable and test some disabled functionality.

• nginx-reverse-proxy

Quick setup of nginx web server in reverse proxy mode for proxying an app. Also provides an example of autodeployment of a Docker container to Dockerhub

• json-editor-customization-textarea-as-positive-number-array

Modifying JDorn's json-editor to use a textarea to prompt for a list of positive numbers

Amateur-Radio Hobbyist code

• satchat Ham Radio and Weather Satellite tracker with chat room in MeteorJS runs at http://beta.satchat.net
• cqwx NOAA APT Weather Satellite signal decoder written in python
• rtlsdr-automated-wxsat-capture Automation for recording and processing signals from an RTLSDR device in Linux