Sergio Ocampo
@socampdi.bsky.social
Econ Assistant Professor working on wealth inequality and macroeconomics
University of Western Ontario
Colombian 🇨🇴 + UMN PHD
https://sites.google.com/site/sergiocampod
University of Western Ontario
Colombian 🇨🇴 + UMN PHD
https://sites.google.com/site/sergiocampod
Learn about our department 🔗https://economics.uwo.ca/people/faculty/tenure.html
October 8, 2025 at 4:24 PM
Learn about our department 🔗https://economics.uwo.ca/people/faculty/tenure.html
We are hosting the Canadian Macroeconomics Study Group at @westernu.ca!
This year's keynote is Kjetil Storesletten @hellerhurwicz.bsky.social
Program 👉 baxter-robinson.github.io/CMSG2025_Pro...
Registration is 100 CAD (70 for students!) 🔗https://economics.uwo.ca/about-us/workshops/index.html
This year's keynote is Kjetil Storesletten @hellerhurwicz.bsky.social
Program 👉 baxter-robinson.github.io/CMSG2025_Pro...
Registration is 100 CAD (70 for students!) 🔗https://economics.uwo.ca/about-us/workshops/index.html
September 23, 2025 at 12:02 PM
We are hosting the Canadian Macroeconomics Study Group at @westernu.ca!
This year's keynote is Kjetil Storesletten @hellerhurwicz.bsky.social
Program 👉 baxter-robinson.github.io/CMSG2025_Pro...
Registration is 100 CAD (70 for students!) 🔗https://economics.uwo.ca/about-us/workshops/index.html
This year's keynote is Kjetil Storesletten @hellerhurwicz.bsky.social
Program 👉 baxter-robinson.github.io/CMSG2025_Pro...
Registration is 100 CAD (70 for students!) 🔗https://economics.uwo.ca/about-us/workshops/index.html
We link higher concentration to the rise in retailers' margins: Higher local concentration can explain 1/4-1/3 of rise in margins 1992-2012.
We also look at the effect of non-store retailers (like Amazon): They have a limited impact in our sample (except for products like toys and electronics).
We also look at the effect of non-store retailers (like Amazon): They have a limited impact in our sample (except for products like toys and electronics).
January 31, 2025 at 5:14 PM
We link higher concentration to the rise in retailers' margins: Higher local concentration can explain 1/4-1/3 of rise in margins 1992-2012.
We also look at the effect of non-store retailers (like Amazon): They have a limited impact in our sample (except for products like toys and electronics).
We also look at the effect of non-store retailers (like Amazon): They have a limited impact in our sample (except for products like toys and electronics).
Where are these increases in concentration coming from? Who is responsible?
Before 2002, it is the expansion of large multi-market retailers that drives concentration, as these retailers opened up stores in new locations.
After 2002, it is consolidation within markets that drives concentration.
Before 2002, it is the expansion of large multi-market retailers that drives concentration, as these retailers opened up stores in new locations.
After 2002, it is consolidation within markets that drives concentration.
January 31, 2025 at 5:14 PM
Where are these increases in concentration coming from? Who is responsible?
Before 2002, it is the expansion of large multi-market retailers that drives concentration, as these retailers opened up stores in new locations.
After 2002, it is consolidation within markets that drives concentration.
Before 2002, it is the expansion of large multi-market retailers that drives concentration, as these retailers opened up stores in new locations.
After 2002, it is consolidation within markets that drives concentration.
Increases take place across product categories!
In retail, firms compete across industries because stores of different ind. sell the same goods. Think Walmart selling groceries and clothing.
We address this by tabulating the *sales of retail stores by product*, to assign them to *product markets*
In retail, firms compete across industries because stores of different ind. sell the same goods. Think Walmart selling groceries and clothing.
We address this by tabulating the *sales of retail stores by product*, to assign them to *product markets*
January 31, 2025 at 5:14 PM
Increases take place across product categories!
In retail, firms compete across industries because stores of different ind. sell the same goods. Think Walmart selling groceries and clothing.
We address this by tabulating the *sales of retail stores by product*, to assign them to *product markets*
In retail, firms compete across industries because stores of different ind. sell the same goods. Think Walmart selling groceries and clothing.
We address this by tabulating the *sales of retail stores by product*, to assign them to *product markets*
National product HHI increased from 1.3 to 4.3
1992-2012👉Probability that two random dollars spent on a product anywhere in the United States are spent at the same firm increased by 3p.p.
Local (commuting zone) concentration
increased by 2.2p.p., from 6.4 to 8.6.
Larger increases for Ind. markets!
1992-2012👉Probability that two random dollars spent on a product anywhere in the United States are spent at the same firm increased by 3p.p.
Local (commuting zone) concentration
increased by 2.2p.p., from 6.4 to 8.6.
Larger increases for Ind. markets!
January 31, 2025 at 5:14 PM
National product HHI increased from 1.3 to 4.3
1992-2012👉Probability that two random dollars spent on a product anywhere in the United States are spent at the same firm increased by 3p.p.
Local (commuting zone) concentration
increased by 2.2p.p., from 6.4 to 8.6.
Larger increases for Ind. markets!
1992-2012👉Probability that two random dollars spent on a product anywhere in the United States are spent at the same firm increased by 3p.p.
Local (commuting zone) concentration
increased by 2.2p.p., from 6.4 to 8.6.
Larger increases for Ind. markets!
Finally out in AEJ:Macro👉 The Evolution of US Retail Concentration w/@dominicsmith.bsky.social
Census data👉*National and local* concentration increased 1982-2012
Trends hold for product and industry markets
🔗https://www.aeaweb.org/articles?id=10.1257/mac.20220249
@aeajournals.bsky.social
Census data👉*National and local* concentration increased 1982-2012
Trends hold for product and industry markets
🔗https://www.aeaweb.org/articles?id=10.1257/mac.20220249
@aeajournals.bsky.social
January 31, 2025 at 5:14 PM
Finally out in AEJ:Macro👉 The Evolution of US Retail Concentration w/@dominicsmith.bsky.social
Census data👉*National and local* concentration increased 1982-2012
Trends hold for product and industry markets
🔗https://www.aeaweb.org/articles?id=10.1257/mac.20220249
@aeajournals.bsky.social
Census data👉*National and local* concentration increased 1982-2012
Trends hold for product and industry markets
🔗https://www.aeaweb.org/articles?id=10.1257/mac.20220249
@aeajournals.bsky.social
Here are some pictures from #MuseoBotero (part of the Colombian Central Bank's Cultural Division)
It was posting this or finishing my grant application... and here we are!
It was posting this or finishing my grant application... and here we are!
January 10, 2025 at 7:43 PM
Here are some pictures from #MuseoBotero (part of the Colombian Central Bank's Cultural Division)
It was posting this or finishing my grant application... and here we are!
It was posting this or finishing my grant application... and here we are!
I hada great day discussing wealth taxes and wealth mobility at the IDB.
Checkout their researchers (and their publications)!
👉 www.iadb.org/en/knowledge...
(Picture from morning run)
Checkout their researchers (and their publications)!
👉 www.iadb.org/en/knowledge...
(Picture from morning run)
November 22, 2024 at 10:58 AM
I hada great day discussing wealth taxes and wealth mobility at the IDB.
Checkout their researchers (and their publications)!
👉 www.iadb.org/en/knowledge...
(Picture from morning run)
Checkout their researchers (and their publications)!
👉 www.iadb.org/en/knowledge...
(Picture from morning run)
Shoutout to Julia Longoria from WNYC More Perfect!
Also to the sporadic (but so worth it!) What Roman Mars can Learn About Con Law w/ Pr. Elizabeth Joh
🔗podcasts.apple.com/ca/podcast/more-perfect/id1117202653
🔗podcasts.apple.com/ca/podcast/what-roman-mars-can-learn-about-con-law/id1242537529
Also to the sporadic (but so worth it!) What Roman Mars can Learn About Con Law w/ Pr. Elizabeth Joh
🔗podcasts.apple.com/ca/podcast/more-perfect/id1117202653
🔗podcasts.apple.com/ca/podcast/what-roman-mars-can-learn-about-con-law/id1242537529
October 20, 2023 at 10:44 AM
Shoutout to Julia Longoria from WNYC More Perfect!
Also to the sporadic (but so worth it!) What Roman Mars can Learn About Con Law w/ Pr. Elizabeth Joh
🔗podcasts.apple.com/ca/podcast/more-perfect/id1117202653
🔗podcasts.apple.com/ca/podcast/what-roman-mars-can-learn-about-con-law/id1242537529
Also to the sporadic (but so worth it!) What Roman Mars can Learn About Con Law w/ Pr. Elizabeth Joh
🔗podcasts.apple.com/ca/podcast/more-perfect/id1117202653
🔗podcasts.apple.com/ca/podcast/what-roman-mars-can-learn-about-con-law/id1242537529