Robert Dur Profile picture
Sep 13, 2020 8 tweets 4 min read Read on X
Shocking paper about the industry that handles over 80% of global goods trade: the maritime shipping industry: papers.ssrn.com/sol3/papers.cf… by Guillaume Vuillemey

The paper documents what happens to "end-of-life ships"...

thread 1/
"almost all ships globally are dismantled in poor environmental conditions after being “beached” on the shores of Bangladesh, India or Pakistan"

Moreover, "a fast-growing number of shipping companies use “last-voyage flags”...

2/
... most likely in an attempt to hide such dirty practices: ships are sold to a third party just for the last voyage to a beaching yard.

In doing so, shipping companies get paid for the value of a ship’s raw materials ...

3/
...but do not assume any of the responsibilities associated with toxic wastes or oil residuals (which end up at sea).

While last-voyage flags were close to non-existent in the early 2000s, they represented 55.2% of all end-of-life ships globally in 2019"

4/
"the six most-popular last-voyage flags are primarily flags that did not exist in the early 2000.

The most striking example is the one of Palau, an island with a population below 20,000 inhabitants and a capital city below 300 inhabitants...

5/
... Its ship registry represents less than 0.001% of the world fleet, but 59.5% of last-voyage flags in 2019.

In other terms, it is likely that this registry has been created specifically with the purpose of allowing shipping companies to evade end-of-life responsibilities"

6/
The paper points to a dark side of globalization:

"the drop in transportation costs [that facilitated globalization] was partly achieved via the evasion of shipowners’ responsibilities, including environmental liabilities"

As a result, "globalization may have gone “too far“

7/
Read the full paper here:

Evading Corporate Responsibilities: Evidence from the Shipping Industry papers.ssrn.com/sol3/papers.cf…

A very important work by Guillaume Vuillemey @HECParis (and a great example of #whateconomistsreallydo)

end/

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More from @DurRobert

Aug 11, 2022
Evidence of widespread p-hacking and publication bias in MTurk studies

docs.iza.org/dp15478.pdf by Abel Brodeur, @nikolaimcook, Anthony Heyes

🧵1/ Image
The evidence for p-hacking and publication bias is particularly strong for MTurk studies in Marketing

2/ Image
For comparison, this is how the distributions look like for lab experiments (left panel) and field experiments (right panel) in economics

3/ Image
Read 6 tweets
Jul 20, 2022
Strong evidence of employer discrimination against veiled Muslim women in 🇳🇱:

🔹almost 70% of job applications that included a photograph such as the one on the left received a positive callback

🔹only 35% if a photograph was included such as the one on the right

🧵 1/ Image
Quite similar results are found for Germany.

In Spain, the level of discrimination against veiled Muslim women is much smaller and not statistically significant.

2/ Image
Employer discrimination is particularly strong when the job requires face-to-face interactions with customers.

Read the full paper by @MFReino, @distasio_val, and Susanne Veit here: doi.org/10.1093/esr/jc…🔓@ESR_news

3/
Read 7 tweets
Jan 10, 2022
What happens to labor earnings after becoming a parent?

This is still very different for women and men.

Take Germany.

Women experience a big drop in earnings after first childbirth — almost 80% in the short run and 60% in the long run.

For men, there is no drop.

🧵1/7
Germany is an extreme case, but sizeable "motherhood penalties" have also been found for Denmark, Sweden, the UK, the US.

Source: aeaweb.org/articles?id=10… by Henrik Kleven, @landais_camille, @JohannaPosch, Andreas Steinhauer, and Josef Zweimüller (2019)

🧵2/7
Now what happens if a young mother in Germany tries to avoid the penalty by returning to work soon after childbirth?

What are her chances of getting a job interview if she applies for a new job?

That's the question Lena Hipp @llhipp addresses in a recent field experiment

🧵3/7
Read 7 tweets
Jan 8, 2020
People do not trust economists, we hear that all the time.

For instance, Esther Duflo recently argued that “economists have lost most of their credibility” citing YouGov data from 🇬🇧 media.eur.nl/Mediasite/Play…

However, slightly newer data give rise to some optimism!

Thread (1/n)
The newer data are also from YouGov in the UK, collected in April 2017, and commissioned by @economics_net and @ing_economics.

Full report: economicsnetwork.ac.uk/research/under…

The questionnaire contains more detailed questions about what people think about economists and economics.

(2/n)
The first bit of good news is that trust in economists is somewhat higher (35%) than in Esther’s data (25%).

(3/n)
Read 11 tweets
Dec 30, 2019
New great paper by Janet Currie, Henrik Kleven, and Esmee Zwiers @ZwiersEsmee documents methodological changes in applied microeconomics in the last 4 decades: aeaweb.org/conference/202…

Thread with some great graphs 👇 (1/n)
Applied Microeconomics has become very dominant in the Top 5 journals:

75% of papers in the Top 5 can be classified as applied microeconomics nowadays

(2/n)
The Credibility Revolution is clearly visible in the data

(3/n)
Read 8 tweets
Jul 7, 2019
A few years ago, a study found strong evidence for discrimination against female migrants wearing headscarves in Germany:

ftp.iza.org/dp10217.pdf by Doris Weichselbaumer, forthcoming in ILR Review

Thread (1/4)

Call-back rates for job interview:
The study has now been replicated in the Netherlands, finding strong evidence for discrimination:

doi.org/10.1080/136918… by @RamosMa_, @LexThijssen, and @MarcelCoenders in a special issue of @scmrjems edited by @BramLancee

(2/4)

Call-back rates for job interview:
Likewise in Spain — and especially in Catalonia — female migrants wearing headscarves receive substantially fewer positive call-backs compared to equally qualified majority applicants:

doi.org/10.1080/136918… by @RamosMa_ et al.

(3/4)

Call-back rates for job interview:
Read 4 tweets

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