In this spirit of this being my 30th paper, I summarise a study showing how people prefer round prices.

Do investors prefer round stock prices? Evidence from Israeli IPO auctions by Shmuel Kandel, Oded Sarig and Avi Wohl (2001)

Paper #30 #30papers30days 🥳🎉🎈 📈 Since 1993, Israel has done stock IPOs differently to most countries. In the US, the price pre-determined on day 1.

In Israel, it's an auction, meaning the price is set by the public. On IPO day, people individually pre-order a desired quantity at a given price. 🪄

NOISE POLLUTION MEANS WORSE GRADES.

The effects of environmental and classroom noise on the academic attainments of primary school children by Bridget Shield & Julie Dockrell (2007)

Paper #29 #30papers30days 🧵 Previous research into the effect of noise on children's educational attainment shows it reduces:

🎓 Grades
🧠 Memory
💪 Motivation
📚 Reading ability

Classic sources include road traffic, trains, aircraft, construction AND noisy classmates 💥

Habits die in new environments but a zest for new ones emerges.

Empowering interventions to promote sustainable lifestyles: Testing
the habit discontinuity hypothesis in a field experiment by Bas Verplanken and Deborah Roy

Paper #28 #30papers30days 🧵 As we know, many people *think* about the environment, but fewer take action to safeguard it.

There are many reasons for this: it may make you worse off, better options may not exist where you live.

🌿 This paper explores the role of habit in taking environmental action.

A three ingredient recipe for keeping your human motivated.

Self-Determination Theory and the Facilitation of Intrinsic Motivation, Social Development, and Well-Being.

Paper #5 #30papers30days 👇 Here's how it opens: a joy to read.

"The fullest representations of humanity show people to be curious, vital, and self-motivated. At their best, they are agentic and inspired, striving to learn; extend themselves; master new skills; and apply their talents responsibly."

Everyone agrees that the ability to understand (and therefore influence) systems is immensely powerful. But what is systems thinking in the first place?

A Definition of Systems Thinking: A Systems Approach by Ross Arnold & John Wade (2015).

Paper #4 #30papers30days 👇 This paper argues that to make Systems Thinking more understandable, a complete definition is required.

The dictionary says "a system is defined as a regularly interacting or interdependent group of items forming a unified whole."

Something more than a collection of its parts.

If you're reading this, you're probably a semi-expert in behavioural economics. Today I read the granddaddy paper of our field: Prospect Theory.

Prospect Theory: An Analysis of Decision under Risk by Daniel Kahneman & Amos Tversky (1979)

Paper #3 #30papers30days 👇 This paper rails against Expected Utility Theory - the idea that we weigh all options up and choose rationally - and ultimately annihilates this idea.

This paper is about certainty. Our desire to pick options that are most certain, even if they are worse.

To spread behaviour and start movements, you should be careful about targeting central hubs.

Complex Contagions and the Weakness of Long Ties by Damon Centola (2007). A summary and light critique.

Paper #1 #30papers30days Most behaviour spreads through social contact. Weak ties - people you barely know - easily spread viruses, and information, like a new job opening. They reach deeply into neighbourhoods you would never know. Whereas, strong ties already know all the gossip.

This is everyone who tweeted #Nudgestock2020.
A few things to point out. A thread:

View full res: drive.google.com/drive/folders/… Centrality. People closest to the centre are the most influential. They have the highest reach or they are associated w/ people who do.

Top 10
@OgilvyConsultUK @rorysutherland @Ogilvy @dilipsoman @42Courses @s_tatam @CassSunstein @danariely @peoplepatterns @CGraves

#SOTU's biggest influencers 2019. You're looking at 27,308 rows of replies, mentions, and retweets between everyone who talked about the State of The Union. Compiled into one graph. View A2 size here: drive.google.com/file/d/1cX7oz0… @ryanafournier
@realdonaldtrump
@betoorourke
@potus
@kamalaharris
@thenoahring
@edkrassen
@aoc
@jacobawohl
@sayshummingbird
@krassenstein
@claytravis
@presssec
@paulkrugman
@starthereabc
@tribelaw
@thebradmielke
@repadamschiff
@washingtonpost
@youtube
@gatewaypundit
@nytimes