The Economist, Apr 5, 2025

choi

(1) Commodity markets | Soldering on; Tin, an unloved critical metal, is enjoying a boom. at page 62.
https://www.economist.com/financ ... -is-enjoying-a-boom

paragraph 2: "The overall market size is tiny: some 380,000 tonnes of tin were refined last year, compared with 26m of copper, another important industrial ingredient. Three countries -- China Indonesia and Peru -- accounted for 74% of global output * * *

Note: tin
https://en.wikipedia.org/wiki/Tin
(table: Melting point  232 °C)

choi

(2) The $9 Question; What happens in an economy when everyone earns the same?  at page 63 (in the column Free Exchange)
("In Dzaleka, however, few produce anything worth trading. * * * Instead, the main economic activity is a relentless exchange of goods and services, which is ultimately based on differences between residents’ wants, rather than the means available to them pbecause eah received $9 a month]. * * * The camp's economy allowed [former British POW Richard] Radford to challenge an old economic assumption. The 'labour theory of value' is most commonly associated with Karl Marx")