Prof. Panagiotis (Panos) Toulis
John E. Jeuck Fellow

  • (2015) sgd R package at CRAN here.
  • (2013) Newer software on Github. I have moved all software projects in Github. Please check out this page for code in causal inference, robust stochastic learning, kidney exchanges, or other side projects.
  • (2010) Perl implementation of the LDA model (Latent Dirichlet Allocation). I built A Perl implementation of the LDA topic model (Blei, Ng and Jordan (2003)). Download the package and follow the instructions on how to build and run LDA instances.
  • (2010) Older Javascript demos on stochastic processes and finance:
    • Sentiment analysis for finance applications: I wrote software using Perl/MPI in order to process in parallel multiple news sources and perform sentiment analysis for two pre-defined assets (e.g. dollar vs. euro). The output is a histogram-like plot indicating positive/negative views with green/red colors. Check out a demo video here. The model used to "understand" the natural-language text is novel and based on "Meaning Filtering Trees" (MFT) which aim to associate descriptive adjectives/verbs (e.g. "plummet", "fall", "rise", "in trouble" etc) with the appropriate entities (e.g. "dollar", "euro" etc) and quantify their positive/negative sentiment.
    • Evolutionary Dynamics - 'In Silico Demo': A simple dynamic demo for viewing the evolution of reactive agent strategies (Tit-for-Tat, All-cooperative etc.) Most of times you will notice the gradual behaviorial shift from defecting to co-operating and forgiving inside the population. This is based on Martin Nowak's "Evolutionary Dynamics" book.
    • Optimizing Scrip Systems In short, scrip systems can be used in order to battle The Tragedy of Commons.
    • Birth-death process. The Birth-Death process involves an initial population and some stochastic process in which, each single element in the population either gives birth to further offsprings, or dies, or stays inactive. Explore a Birth-Death process with only one element at the beginning. Use the "Draw" button, to plot the population over time.
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