Richard John Smith

11 Questions 39 Answers 0 Followers

Questions related from Richard John Smith

Why do spatial interaction models for migration include a row for stayers, but gravity models for trade do not include a row for internal trade?

This would be a good question for a regional scientist. I'm modeling flows of students between school districts. A helpful reviewer pointed me to previous work that modeled such flows using...

25 June 2021 4,578 3 View

What is the best spatio-temporal disease transmission model for covid-19?

Obviously, the world is watching covid-19 transmission very carefully. Elected officials and the press are discussing what "the models" predict. As far as I can tell, they are talking about the...

06 April 2020 4,513 7 View

Pooled standard errors of median household values in US Census tracts?

A colleague of mine did a neighborhood survey of a set of US Census tracts. One of the variables he asked is household income. He wants to know if the median income in his sample is significantly...

11 February 2020 8,525 0 View

As anyone assembled United States Census Tract and County data for mid-census years before ACS (e.g., 1995, 1985, 1975, etc.)?

I have been using tract and county data from 1940 - 2010 as prepared by John Logan's team at Brown University. I also have the Geolytics Time Series Research Database and am aware of the National...

13 April 2017 4,630 0 View

How to calculate conditional treatment effects with a treatment covariate interaction in Stata 14 with complex survey data?

From the teffects documentation in Stata 14, I see that the margins command may be used to calculate the conditional ATE or ATET for a subpopulation for etpoisson and etregress. Both etpoisson and...

28 June 2016 8,473 2 View

Has anyone found a way to use rbounds and mhbounds in Stata with teffects?

Has anyone found a way to use rbounds and mhbounds in Stata with teffects? In particular, with nearest neighbor matching. What would one use for the weight and support variable? Is there a...

07 April 2016 8,784 1 View

What's the best package in R for calculating the distance between two polygons? Should I convert the polygons to points first?

Specifically, if I have the US Census place layer and I have selected a set of places, I need the distance to the nearest selected place for all places.

17 February 2016 8,758 4 View

What are the best current review articles for measuring urban social sustainability?

There is a vast literature on neighborhood and community indicators. Some focus more on economic well-being, others social well-being, health, or environmental sustainability. Researchers tend to...

17 February 2016 8,334 6 View

Is there an add on in Stata that does cluster analysis using pam, diana, agnes, fanny, etc.?

I know how to do it in R, but I have a colleague using a restricted data set where Stata is the only option for analysis.

05 February 2015 9,882 4 View

Where do I obtain a list of all local governments (e.g., city, census place) in the United States by year of incorporation?

I completed a policy scan of local governments and immigrant integration in the United States. It would be nice to include year of founding or year of incorporation as an independent variable....

19 December 2013 3,960 8 View

Has anyone already wrote an R package that does panel negative binomial regression using a population averaged model (GEE)?

I have a pre-post treatment and comparison quasi-experiment for business foundings and failures.I have been able to use xtnbreg or xtgee in Stata to estimate this regression, but I would like to...

29 November 2013 9,389 1 View