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  1. People I (Mostly) Admire
  2. 37. Sendhil Mullainathan Thinks Messing Around Is the Best Use of Your Time
37. Sendhil Mullainathan Thinks Messing Around Is the Best Use of Your Time

37. Sendhil Mullainathan Thinks Messing Around Is the Best Use of Your Time

People I (Mostly) Admire · Aug 29, 2026

Economist Sendhil Mullainathan champions play and experiential learning over passive reading, exploring VR, decision biases, and his new app, Pique.

Virtual Reality's True Power Is Decoupling Your Office From a Physical Location

VR could make your "office" a personal, portable space, not a building. This parallels how cell phones untethered phone numbers from physical locations, which could radically transform work, collaboration, and urban geography by making your professional presence independent of any single place.

37. Sendhil Mullainathan Thinks Messing Around Is the Best Use of Your Time thumbnail

37. Sendhil Mullainathan Thinks Messing Around Is the Best Use of Your Time

People I (Mostly) Admire·a month ago

Frivolous "Play" is the Underrated Engine for New Technology Adoption

Early, playful uses of new technologies, like VR games, shouldn't be dismissed. This "messing around" phase is crucial because it builds user enthusiasm, drives initial demand, and creates the foundational layer of infrastructure and expertise upon which serious applications are later built.

37. Sendhil Mullainathan Thinks Messing Around Is the Best Use of Your Time thumbnail

37. Sendhil Mullainathan Thinks Messing Around Is the Best Use of Your Time

People I (Mostly) Admire·a month ago

Our Brains Prioritize Salient Details Over Important Information for Memory

Memory isn't a rational filing system; it's driven by salience. A striking visual (a clown wig) or a strong smell (Proust's madeleine) will anchor a memory far more effectively than the intrinsic importance of the information itself. This principle is key to designing more effective learning experiences.

37. Sendhil Mullainathan Thinks Messing Around Is the Best Use of Your Time thumbnail

37. Sendhil Mullainathan Thinks Messing Around Is the Best Use of Your Time

People I (Mostly) Admire·a month ago

We Forget What We Read Because Passive Learning Fails to Create Lasting Memories

Our memory system is not designed for passively absorbing text. It prioritizes sensory and experiential input, which is why you remember a meal from five years ago but forget the details of a book you loved. To make learning stick, it must be transformed into an active, memorable experience.

37. Sendhil Mullainathan Thinks Messing Around Is the Best Use of Your Time thumbnail

37. Sendhil Mullainathan Thinks Messing Around Is the Best Use of Your Time

People I (Mostly) Admire·a month ago

The $20 Auction Reveals How Sunk Costs Trap People into Escalating Bad Decisions

By auctioning a $20 bill where both the winner and second-highest bidder pay, you create an experience of irrational escalation. Participants become trapped by past investments (their bids), demonstrating how the sunk cost fallacy drives people to throw good money after bad in real-time.

37. Sendhil Mullainathan Thinks Messing Around Is the Best Use of Your Time thumbnail

37. Sendhil Mullainathan Thinks Messing Around Is the Best Use of Your Time

People I (Mostly) Admire·a month ago

Defeat Decision Paralysis by Assuming Tomorrow Will Be a Repeat of Today

We delay tough choices under the false hope that "tomorrow will be different." This psychological bias creates procrastination. A powerful heuristic is to force the decision by asking: "If tomorrow is just like today and yesterday, what should I do?" This simple question cuts through decision clutter.

37. Sendhil Mullainathan Thinks Messing Around Is the Best Use of Your Time thumbnail

37. Sendhil Mullainathan Thinks Messing Around Is the Best Use of Your Time

People I (Mostly) Admire·a month ago

Indecision About Major Life Changes Signals You Should Make the Change

When you are near-indifferent about a big decision, like quitting a job, you're likely held back by status quo bias. Economist Steve Levitt's coin-flip experiment showed people who were encouraged to make a change were happier. Therefore, true indifference is a strong signal that you should overcome inertia and act.

37. Sendhil Mullainathan Thinks Messing Around Is the Best Use of Your Time thumbnail

37. Sendhil Mullainathan Thinks Messing Around Is the Best Use of Your Time

People I (Mostly) Admire·a month ago

Real-World Learning Fails Because Life is a "Wicked Environment" With No Feedback

Unlike school's constant, direct feedback, professional life offers very little. This "wicked learning environment" makes improvement nearly impossible for roles like judges or managers. The key is not just to train individuals better, but to redesign professional systems to provide the feedback loops that drive learning.

37. Sendhil Mullainathan Thinks Messing Around Is the Best Use of Your Time thumbnail

37. Sendhil Mullainathan Thinks Messing Around Is the Best Use of Your Time

People I (Mostly) Admire·a month ago

Corporate Experimentation Fails Because Leaders Must First Admit They Don't Know the Answer

The true obstacle to running experiments in a business setting is not resources but culture. An experiment, by definition, requires admitting ignorance upfront. This directly conflicts with the organizational expectation that leaders should possess expertise and certainty, thus stifling learning and innovation.

37. Sendhil Mullainathan Thinks Messing Around Is the Best Use of Your Time thumbnail

37. Sendhil Mullainathan Thinks Messing Around Is the Best Use of Your Time

People I (Mostly) Admire·a month ago

Choose Your Job Based on the Colleagues You Want to Become

People underestimate how much they will change, a bias called the "end of history illusion." When choosing a job, you aren't just selecting a role; you are choosing the people who will shape your future self. The most important question is not "What will I do?" but "Who will I become?"

37. Sendhil Mullainathan Thinks Messing Around Is the Best Use of Your Time thumbnail

37. Sendhil Mullainathan Thinks Messing Around Is the Best Use of Your Time

People I (Mostly) Admire·a month ago