April 2020

random generators produce ties

April 20, 2020 | xi'an

“…an essential part of understanding how many ties these RNGs produce is to understand how many ties one expects in 32-bit integer arithmetic.” A sort of a birthday-problem paper for random generators by Markus Hofert on arXiv as to why they produce ties. As shown for instance in the R ... [Read more...]

Q is for qplot versus ggplot

April 20, 2020 | Unknown

Two years ago, when I did Blogging A to Z of R, I talked about qplots. qplots are great for quick plots - which is why they're named as such - because they use variable types to determine the best plot to generate. For instance, if I give it a ...
[Read more...]

The Treachery of Models

April 20, 2020 | Corey Chivers

In Magritte’s famous 1929 painting The Treachery of Images, a pipe is depicted with the caption “Ceci n’est pas une pipe“, French for “This is not a pipe”. The seemingly dissonant statement under what is a very clearly depicted pipe forces the viewer to confront the distinction between the ...
[Read more...]

Israeli elections on Twitter

April 19, 2020 | R on Amit Levinson

Introduction Israel had its 3rd election within 12 months on March 2, 2020. This is because our Knesset - Hebrew term for house of representatives - wasn’t able to form or hold a government after each of the previous elections. As I won’t get into the politics of why they didn’...
[Read more...]

dowhy library exploration

April 19, 2020 | R on Just be-cause

It is not often that I find myself thinking “man, I wish we had in R that cool python library!”. That is however the case with the dowhy library which “provides a unified interface for causal inference methods and automatically tests many assumptio...
[Read more...]

Israeli elections on Twitter

April 19, 2020 | R on Amit Levinson

Introduction Israel had its 3rd election within 12 months on March 2, 2020. This is because our Knesset - Hebrew term for house of representatives - wasn’t able to form or hold a government after each of the previous elections. As I won’t get into the politics of why they didn’...
[Read more...]

Israeli elections on Twitter

April 19, 2020 | R on Amit Levinson

Introduction Israel had its 3rd election within 12 months on March 2, 2020. This is because our Knesset - Hebrew term for house of representatives - wasn’t able to form or hold a government after each of the previous elections. As I won’t get into the politics of why they didn’...
[Read more...]

Risk premia

April 19, 2020 | R on OSM

Our last post discussed using the discounted cash flow model (DCF) as a method to set return expectations that one would ultimately employ in building a satisfactory portfolio. We noted that if one were able to have a reasonably good estimate of the cash flow growth rate of an asset, ...
[Read more...]

Use R & GitHub as a Workout planner

April 19, 2020 | Colin Fay

Over the years, I’ve been trying a bunch a different applications and methods to stay motivated to workout. But every time it’s the same: at some point the application is great but limited if you do not pay, or the workouts are repetitive, or simpl...
[Read more...]

dowhy library exploration

April 19, 2020 | R on Just be-cause

It is not often that I find myself thinking “man, I wish we had in R that cool python library!”. That is however the case with the dowhy library which “provides a unified interface for causal inference methods and automatically tests many assumptions, thus making inference accessible to non-experts”. Luckily ...
[Read more...]

New R package: GetCVMData

April 19, 2020 | R on msperlin

Package GetCVMData is an alternative to GetDFPData. Both have the same objective: fetch corporate data of Brazilian companies trading at B3, but diverge in their source. While GetDFPData imports data directly from the DFP and FRE systems, GetCVMData uses the CVM ftp site for grabbing compiled .csv files. When doing ... [Read more...]

Financial Datasets Available in the Website

April 19, 2020 | R on msperlin

I’ve been researching financial data for over 10 years and compiled a great deal of compiled tables. Most of these comes from my R packages and have been used for creating class material, doing research and even writing a book. These files were mostly found in many copies across different ... [Read more...]

No excuse not to be a Bayesian anymore

April 19, 2020 | Econometrics and Free Software

My first encounter with Bayesian statistics was around 10 years ago, when I was doing my econometrics master’s degree. I was immediately very interested by the Bayesian approach to fit econometric models, because, when you’re reading about Bayesian approaches, it just sounds so easy and natural. You have a ... [Read more...]
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