Projects to do

A social enterprise tries to do good and stay solvent, and the way it earns often decides whether it can keep serving its target group.

A fee added to every air ticket pays for the airport, but it also changes who can afford to travel and which routes airlines choose.

Cities often move street vendors into fixed zones, which can reduce crowding but may cut the footfall that keeps vendors alive.

A craft that sells for a good price in a city shop may leave the artisan very little, and few buyers know where the rest goes.

A survey can sound precise yet speak only for the people who were easy to reach, and the missing voices may matter most.

A randomised trial is strong evidence, but only if it was run well and the results apply beyond the place where it was done.

Rate decisions reach everyone through loans and savings, yet the announcements are written in a language that hides the reasoning.

A school meal scheme costs public money and gives benefits that are hard to count, so choices about what to include change the verdict.

Official inflation averages everyone's shopping, but a student's basket of rent, travel and food can feel very different.

Drivers, a ride app and passengers each act in their own interest, and the fares everyone ends up with may suit none of them.

Insurers worry that sick people buy cover more eagerly and that insured people take less care, and these two worries shape every policy.

Rent control is meant to protect tenants, yet owners and economists warn of side effects such as fewer homes offered for rent.

Most students intend to save but spend what is in the wallet, which is a classic gap between intention and action.

Where the pipe does not reach, tankers fill the gap, and the market can be orderly, rough or controlled by a few suppliers.

Electricity tariffs often charge homes, shops and farms differently, and the pattern hides trade-offs between cost, fairness and the utility's finances.

Rival pumps on the same road often show nearly the same prices day after day, which looks calm but hides a quiet strategic understanding.

The same reminder can feel like a threat, a favour or a duty, and the wording may change whether people pay on time.