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Asjad Naqvi Profile picture
@AsjadNaqvi
Oct 31, 2022 • 11 tweets • 15 min read • Read on X
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The #30DayMapChallenge 2022 starts tomorrow. In the last 2 years a lot of work has been put in @Stata to mainstream some of the map elements we find in other softwares. He is a 🧵 on the different types of maps one can make. If you want the code for any, just msg! Let's go 👇
The basic #spmap package can already do a lot! Here are some examples using standard spmap syntax.

These were made for the online #GIS tutorials earlier this year that were fairly well attended! Over 1400+ registrations and 500+ ppl online. Might repeat it again. ImageImageImageImage
The #bimap package that actually was the result of the #30DayMapChallenge last year allows you to combine two variables to check for interesting spatial correlations.

Install from SSC (ssc install bimap, replace)

See GitHub for further instructions
github.com/asjadnaqvi/sta… ImageImageImageImage
One can now also clip maps in @Stata using the #clipgeo package:

ssc install cligeo, replace
github.com/asjadnaqvi/sta…

Clip your polygons however you want! Rectangles, squares, or any other regular polygon shape.

Zoom in to the regions! ImageImageImageImage
There are also several guides written in the past years to completely rework how maps are made. For example the #OpenStreetMaps to @Stata guide shows how to get the layers in Stata:

medium.com/the-stata-guid…

Some examples below including an entry from the 2021 #30DayMapChallege ImageImageImageImage
This guide tells how to complete reprogram maps to draw whatever you want!
medium.com/the-stata-guid…

Some more examples from the challenge last year that use this: ImageImageImageImage
One is also not confined to actual maps. Maps can also be made in a lot of other ways. Here are examples of #joyplots, #scatter plots, #tilemaps.

For these, data is usually extracted from rasters and other layers and plotted. Africa/USA tilemap guides:
medium.com/the-stata-guid… ImageImageImageImage
Here is a classic one from 2 years ago for the #DuBoisChallenge that got my started on maps in #Stata.

This was the first complete fully customized map replication in #Stata. You can fine more on this here:
github.com/asjadnaqvi/DuB… ImageImage
There are really cool packages out there as well. For example #getcensus allows direct access to ACS data. See detailed thread here on how to pull the data and map it:


Also see #hexmaps that are part of the #maptile package for some cool USA maps. ImageImageImageImage
You can also look at the 2021 #30DayMapChallenge entries here

github.com/asjadnaqvi/30D…

where 20 of the 30 maps were made in @Stata. Here is one of my fav ones. Any animation that color blends across months and years to show the Antarctica ice sheet extent.
Some more map-related #Stata content will be released this month + early 2023, so stay tuned!

First releases r always here:
medium.com/the-stata-guide

Otherwise, if you want to make a particular map, or are lost, or need the code, support, just msg!

Good luck 😎

/END

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More from @AsjadNaqvi

Asjad Naqvi Profile picture
Dec 6, 2023
The #DiD website's #Winter2023 update is here with tons of new packages and code.

It is still being updated but a LOT of new information has been added and the page has been cleaned up. It should now also load faster.



#EconTwitter

Summary 👇asjadnaqvi.github.io/DiD/
New DiD packages added with links, installation methods, and paper references.

New ones from 2023 are:
- jwdid
- wooldid
- lpdid
- fect
- xtevent
- sdid
- hdidregress

Existing packages have also been updated! Image
A major cleanup of the Code section. Generate data, find your estimator, install it, and run the command. Compare the results across packages.

This section has a major update planned in the coming weeks for additional package testing. Stay tuned! Image
Read 4 tweets
Asjad Naqvi Profile picture
Sep 13, 2023
#Stata v18 has added a bunch of new features to control colors in the past updates. Let's start with an example data:

set scheme stcolor
sysuse census.dta, clear
gen under5 = (poplt5 / pop) * 100

twoway (scatter under5 medage, msize(2))

The scheme layout has minor tweaks: Image
A new feature of v18 is to color by groups using a single line:

twoway (scatter under5 medage, msize(2) colorvar(region) colordiscrete)

This is amazing but 2 issues; discrete variables should have a regular legend. The line legend is confusing. The hues are not readable. Image
More options have been added to define start and end colors

twoway (scatter under5 medage, msize(2) colorvar(region) colordiscrete colorstart(red) colorend(eltblue))

But still we end up with hues where categories 3 and 4 are not discernible. Image
Read 9 tweets
Asjad Naqvi Profile picture
Oct 28, 2022
Half through sorting the #dataviz bookmarks and still haven't found the links I am looking for (the curse of over bookmarking).

But here are 10+1 super amazing, interactive, and midn-blowing🤯 #environment, #climate, #trade, #emissions related websites that are just 🤩

👇👇
1/ The #WorldBank's #SDG atlas covers each #SDG goal in detail with some great datavizzes inside each of them. Check it out! Really a lot of effort went into this.

datatopics.worldbank.org/sdgatlas/
2/ @ChathamHouse brings an interactive resource website that allows you to explore bi-lateral #trade linkages. Data currently ranges from 2000-2020.

resourcetrade.earth
Read 13 tweets
Asjad Naqvi Profile picture
Oct 15, 2022
A late night 🧵 on some tips for making grayscale (BW) & colorblind (cblind) friendly graphs in @Stata. BW in case people print out papers, and cblind to make sure documents are "barrier free".

Graphs have 3 elements that we can control: colors, line patterns, & symbols.

1/
Let's start with colors: Whatever color scheme we use, we can check whether it will pass the BW and cblind tests. This can be easily tested using the palettes package. Install these, if you haven't already:

ssc install palettes, replace
ssc install colrspace, replace

2/
There are three types of common color-blindnesses that can we can check in #Stata: "Protanopia" & "Deuteranopia" where shades of red and green are not discernable, & "Tritanopia" where blue-green, purple-red, yellow-pink are hard to differentiate.

Test yourself 👇👇

3/ Image
Read 13 tweets
Asjad Naqvi Profile picture
Oct 11, 2022
The ultimate clustering standard errors paper just dropped:

When Should You Adjust Standard Errors for Clustering?

by some big names in the field :)

academic.oup.com/qje/advance-ar…
Here is a quick paper pass: The authors discuss 3 misconceptions:

1) clustering is needed when smaller units are correlated with larger units (its not!)

2) just do clustering for the sake of robustness (dont!)

3) researchers use either cluster SEs OR robust SEs (use both!)
The authors provide a discussion and recommendations on:

1) clustering strategy in the design process (e.g. sampling, DGP etc.)

2) clustering strategy in the assignment process (e.g. clustering of treatments etc.)

Second can also help understand the data better.
Read 5 tweets
Asjad Naqvi Profile picture
Sep 14, 2022
A 🧵 to consolidate the #Statatip posts from the past three years! Bookmark these.

If you want to read them in detail, have a look at the Awesome @Stata tips collection:

medium.com/the-stata-guid…

Its updated every 2-3 months or so. Many tips below 👇
Using value labels as variable names

#statatip

Using variable labels as names

#statatip

Read 38 tweets

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