How did mobile kitchens become popular with hipster gourmands? And just how much money can a popular truck make from a lunch shift? Zachary Crocket drops some napkins.

• SOURCES:
  • Mariel-Leona Edwards, senior operations manager for Señor Sisig.
  • Matthew Geller, founding president of the National Food Truck Association and C.E.O. of the Southern California Mobile Food Vendors Association.
  • Evan Kidera, C.E.O. and co-owner of Señor Sisig.

• RESOURCES:
  • "Seed Planted in SF State MBA Program Grows Into Mini-Filipino Food Empire," by Jamie Oppenheim (SF State News, 2022).
  • "Inside Señor Sisig, the First Restaurant for a Pioneer of Filipino-American Cuisine," by Luke Tsai (Eater, 2019).
  • "Tamales, L.A.’s Original Street Food," by Gustavo Arellano (Los Angeles Times, 2011).

• EXTRAS:
  • "Why You Shouldn’t Open a Restaurant (Update)," by Freakonomics Radio (2019).

Youth baseball — long a widely accessible American pastime — has become overrun by $10,000-per-year, for-profit travel leagues. Zachary Crockett peers inside the dugout.

• SOURCES:
  • Linda Flanagan, author.
  • Nick Mackenzie, future New York Yankees shortstop.
  • R.J. Mackenzie, physical education teacher and baseball dad.
  • John Miller, journalist and baseball coach.

• RESOURCES:
  • "The Cost of Youth Baseball Is Getting Absurd," by Adam Minter (Bloomberg, 2024).
  • "Perfect Game Sees Prosperity Thanks To New Investments In Youth Sports," by Wayne G. McDonnell, Jr. (Forbes, 2024).
  • "How America Sold Out Little League Baseball," by John W. Miller (America Magazine, 2022).
  • "In Youth Sports, Talent Helps but Money Rules," by Roman Stubbs (The Washington Post, 2022).
  • Take Back the Game: How Money and Mania Are Ruining Kids Sports and Why It Matters, by Linda Flanagan (2022).
  • "State of Youth Sports: Parents, Policymakers Better Appreciate Physical Activity, Face Barriers to Help Kids Play," by Jon Solomon (The Aspen Institute, 2022).

• EXTRA:
  • Take Back the Game: How Money and Mania Are Ruining Kids Sports and Why It Matters, by Linda Flanagan (2022).

Why do we use a specific kind of tree-bark tissue to seal up 70 percent of wine bottles? Zachary Crockett takes a sniff and gives the waiter a nod.

• SOURCES:
  • Carlos De Jesus, director of communications at Amorim Cork.

• RESOURCES:
  • "This Ancient Material Is Displacing Plastics and Creating a Billion-Dollar Industry," by Marta Vidal (The Washington Post, 2024).
  • "Troubled Times For Wine In 2023: Global Production And Consumption Shrinking," by Per and Britt Karlsson (Forbes, 2024).
  • "Three Studies Take A Look At Various Wine Bottle Closure Preferences," by Thomas Pellechia (Forbes, 2019).
  • "How Millennials (Almost) Killed the Wine Cork," by John Gifford (The Atlantic, 2016).

Grocery stores have turned shoppers into cashiers. Zachary Crockett runs two bags of chips and a Gatorade over the scanner.

• SOURCES:
  • Sara Alloy, experience retail lead for North America at Publicis Sapient.
  • Christopher Andrews, professor of sociology at Drew University.
  • Phil Lempert, founder and C.E.O. of SupermarketGuru.

• RESOURCES:
  • "Feeling Rewarded and Entitled to Be Served: Understanding the Influence of Self- Versus Regular Checkout on Customer Loyalty," by Farhana Nusrat and Yanliu Huang (Journal of Business Research, 2024).
  • "It’s Not Just You: Self-Checkout Is Awful. These Retailers Finally Agree," by Sarah Bregel (Fast Company, 2023).
  • "'I'm Banned From Walmart Over a Bag of Reese's,' Houston-Area Woman Says After Self-Checkout 'issue,'" by Matthew Seedorff (Fox26, 2023).
  • "Self-Checkout Is a Failed Experiment," by Amanda Mull (The Atlantic, 2023).
  • The Overworked Consumer: Self-Checkouts, Supermarkets, and the Do-It-Yourself Economy, by Christopher Andrews (2018).
  • "The Banana Trick and Other Acts of Self-Checkout Thievery," by Rene Chun (The Atlantic, 2018).
  • "Self-Service Checkouts Can Turn Customers Into Shoplifters, Study Says," by Christopher Mele (The New York Times, 2016).
  • "Check This Out: A Revolution in the Supermarket," by Daniel P. Puzo (Los Angeles Times, 1987).

• EXTRAS:
  • "How the Supermarket Helped America Win the Cold War," by Freakonomics Radio (2019).

Does anyone ever win the giant teddy bear? Zachary Crockett steps right up.

• SOURCES:
  • Matthew Gryczan, retired journalist and engineer.
  • Elliot Simmons, former carnival game worker.
  • Olivia Turner, general manager of Redbone Products.

• RESOURCES:
  • "AG Platkin Announces 10-Year Ban of Amusement Games Licenses and a Fine for Wildwood Games Operator," by the New Jersey Office of the Attorney General (2023).
  • "N.H. Man Loses Life Savings on Carnival Game," (C.B.S. News Boston, 2013).
  • "Carnival Games: Walking the Line Between Illegal Gambling and Amusement," by J. Royce Fichtner (Drake Law Review, 2012).
  • "Carnivals: Law Enforcement on the Midway," by Bruce Walstad (F.B.I. Law Enforcement Bulletin, 1997).
  • Carnival Secrets: How to Win at Carnival Games, Which Games to Avoid, How to Make Your Own Games, by Matthew Gryczan (1988).

With industries relying on them and profits to be made, weather forecasts are more precise and more popular than ever. But there are clouds on the horizon. Zachary Crockett grabs an umbrella.

• SOURCES:
  • Steve Adelman, head of Adelman Law Group, PLLC and vice president of the Event Safety Alliance.
  • Peter Neilley, director of weather forecasting sciences and technologies for The Weather Company.

• RESOURCES:
  • "Traders Have Turned Betting on the Weather, a Technique Pioneered by Enron, Into a Booming $25 Billion Market," by Dylan Sloan (Fortune, 2024).
  • "Why Your Weather Forecasts May Soon Become More Accurate," by Dan Stillman (The Washington Post, 2023).
  • "The High-Tech Race to Improve Weather Forecasting," (The Economist, 2023).
  • "Study: Climate Change Has Increased Atmospheric Instability Over Past 40 Years," by University at Albany (Phys.org, 2023).
  • "Beyoncé Concert In D.C. Suburb Highlights Complex Weather Challenges," by Marshall Shepherd (Forbes, 2023).
  • "Forecast Process," by the U.S. National Weather Service.

• EXTRAS:
  • "How Will We Handle the Heat?" by Freakonomics Radio (2022).
  • "The Folly of Prediction," by Freakonomics Radio (2011).

A fraternity’s budget includes broken windows, liability insurance, chili dog breakfasts, and the occasional $40,000 DJ. Zachary Crockett crashes the party.

• SOURCES:
  • Anthony Anderson, member of the Sigma Alpha Epsilon fraternity.
  • Danielle Logan, owner of Fraternity Management.
  • Charlie O’Neill, member of the Sigma Alpha Epsilon fraternity.
  • Stephen J. Schmidt, professor of economics at Union College.

• RESOURCES:
  • "If Student Deaths Won't Stop Fraternity Hazing, What Will?" by Ben Kesslen (NBC News, 2021).
  • "Social Animal House: The Economic And Academic Consequences Of Fraternity Membership," by Jack Mara, Lewis Davis, and Stephen Schmidt (Contemporary Economic Policy, 2018).
  • "How Fraternities Exacerbate Inequality," by Jillian Berman (MarketWatch, 2017).
  • "18 U.S. Presidents Were in College Fraternities," by Maria Konnikova (The Atlantic, 2014).
  • Inside Greek U.: Fraternities, Sororities, and the Pursuit of Pleasure, Power, and Prestige, by Alan D. DeSantis (2007).

• EXTRAS:
  • "Freakonomics Radio Goes Back to School," series by Freakonomics Radio (2022).

How does bail work — and who's really paying? Zachary Crockett follows the money.

• SOURCES:
  • Joshua Page, professor of sociology and law at the University of Minnesota.
  • Steven Zalewski, criminal defense attorney and co-owner of Affordable Bails New York.

• RESOURCES:
  • "Does Bail Reform Increase Crime in New York State: Evidence from Interrupted Time-Series Analyses and Synthetic Control Methods," by Sishi Wu and David McDowall (Justice Quarterly, 2023).
  • "Profit Over People: The Commercial Bail Industry Fueling America’s Cash Bail Systems," by Allie Preston and Rachael Eisenberg (Center for American Progress, 2022).
  • "All Profit, No Risk: How the Bail Industry Exploits the Legal System," by Wendy Sawyer (Prison Policy Initiative, 2022).
  • "A Debt of Care: Commercial Bail and the Gendered Logic of Criminal Justice Predation," by Joshua Page, Victoria Piehowski, and Joe Soss (RSF: The Russell Sage Foundation Journal of the Social Sciences, 2019).
  • "The Economics of Bail and Pretrial Detention," by Patrick Liu, Ryan Nunn, and Jay Shambaugh (The Hamilton Project, 2018).
  • "Selling Off Our Freedom: How Insurance Corporations Have Taken Over Our Bail System," by Color Of Change and ACLU’s Campaign for Smart Justice (2017).
  • "Inside the Wild, Shadowy, and Highly Lucrative Bail Industry," by Shane Bauer (Mother Jones, 2014).

• EXTRAS:
  • "To Catch a Fugitive," by Freakonomics Radio (2011).