3 ms·Also Vatican City.by mruts 7y agoAlso Vatican City.philwelch 7y agoI was sticking to the ones known for being wealthy, otherwise I would have mentioned San Marino and Liechtenstein.mruts 7y agoI think Vatican City qualifies as being wealthy af.pdub123 7y agoThe context is "but has failed to be a research hub, in contrast to rich city states like Singapore." Are these city states research hubs? Hong Kong or Liechtenstein perhaps.mruts 7y agoI mean, Vatican City is probably the oldest research hub in current existence.