Other articles

1. Causal Inference: What If, Part 1

   Introduction

   I was exposed to the concept of causal inference in the excellent Statistical Rethinking series/book, by Richard McElreath. I suppose I had been exposed to it indirectly via my scientific education, but not in the formal sense of back-door criterion, etc. Anyway, I decided to try and expand …

   read more

2. Noise

   Introduction

   I found a paper about noise pollution in Portland. This was related to a job posting I saw by one of the authors. It is:

   Mowrer, C., Larkin, A., Roscoe, C., Grady, S. T., Peters, J. L., Haggerty, B., Hystad, P., Bozigar, M. (2025) Systematic measurement and machine learning-based …

   read more

3. Count Data Model Options

   Introduction

   In going through that ill-fated analysis of Pennsylvania well water, I plotted the actual count data of (# of well users) in each census tract. There were an awful lot of zeroes: overall 46% of census tracts, more specifically 14% of rural and 59% of urban tracts. The histograms look …

   read more

4. PA Well Water, Part 6: Analyzing the Data

   Introduction

   This post continues from Part 5. At long last, we've got our pieces in place. Time to plug it into our processing method!

   Method

   The actual code for what follows is here.

   I used the following clustering covariates: "EP_POV150", "EP_UNEMP", "EP_NOHSDP", "EP_AGE65", "EP_AGE17", "EP_MINRTY", "EP_HBURD". These are the Estimated …

   read more

5. PA Well Water, Part 5: Estimating the Outcome Variable

   Introduction

   This post expands on Part 3 -- specifically the section concerning Outcome Approximations -- and begins preparing data for analysis.

   In this post, I will compare the estimation method used in the paper vs an alternative, and then look at a few other published methods. The estimation is for the outcome …

   read more

6. PA Well Water, Part 4

   Introduction

   This post continues from Part 3 and covers the Bayesian profile regression model.

   Bayesian Profile Regression

   What Is It?

   There were several resources I used to get a grasp on the method. Molitor et al. ² present kind of the founding proposal of the method, and this is a …

   read more

7. PA Well Water, Part 3

   Introduction

   This post continues from Part 2 and covers the model's accounting for rurality.

   The authors write:

   rural areas will have more domestic wells.

   Which makes sense and is what I would presume, but their citation for said claim doesn't seem to say that(? I just did a search for …

   read more

8. PA Well Water, Part 2

   Introduction

   This post continues from Part 1 and covers the standardization of the covariates used for the clustering part of their model.

   I think it'll wind up pretty short. I had initially created some maps to show off, but decided that they didn't add anything substantial to the explanation.

   My …

   read more

9. PA Well Water, Part 1

   Introduction

   I found a paper on PLOS Water:

   Wamsley M, Coker ES, Wilson RT, Henry K, Murphy HM (2024) Social vulnerability and exposure to private well water. PLOS Water 3(12): e0000303. https://doi.org/10.1371/journal.pwat.0000303

   I can't do a better job than the authors of …

   read more

Page 1 / 2 » ⇉