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A fake review can affect people who never read it

A fabricated review could enter an average star rating even if its words go unread. The effects can also reach competing sellers whose real customers are being compared with invented ones.

3–7 min

Questions you could explore

  • What changes when an unreliable review becomes part of a rating or ranking?
  • Who bears the cost when honest and fabricated recommendations compete?

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Economics and money

Why can the official inflation rate differ from your shopping bill?

A national price index combines thousands of goods and services that no single household buys in the exact same proportions. Because the Consumer Price Index uses average spending weights, a jump in rent or groceries can hit your personal budget much harder than the headline inflation figure suggests.

4–5 min

Why can the official inflation rate differ from your shopping bill?

Economics and money4–5 minA national price index combines thousands of goods and services that no single household buys in the exact same proportions. Because the Consumer Price Index uses average spending weights, a jump in rent or groceries can hit your personal budget much harder than the headline inflation figure suggests.

Economics and money

What does a free afternoon still cost you?

An hour can be free of charges and still be scarce. Choosing one use means giving up the best available alternative, which is the opportunity cost even when no money changes hands.

3–5 min

What does a free afternoon still cost you?

Economics and money3–5 minAn hour can be free of charges and still be scarce. Choosing one use means giving up the best available alternative, which is the opportunity cost even when no money changes hands.

Economics and money

How can insurance spread financial risk across a group?

An uncertain large loss for one person can become part of a wider pool of risks. Insurance connects that pooling with a contract and a premium, while the contract still determines which losses are covered.

3–7 min

How can insurance spread financial risk across a group?

Economics and money3–7 minAn uncertain large loss for one person can become part of a wider pool of risks. Insurance connects that pooling with a contract and a premium, while the contract still determines which losses are covered.

A fake review can affect people who never read it | Speech Topic | speaking.app