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THREAD: My Top 12 Favourite Perceptual Illusions

1. A great example of how expectations guide perception.


2. The horizontal lines in this image are all parallel.
https://t.co/Y0o0hd8R15 HT @victoria1skye


3. The circles in this image are all the same colour. https://t.co/H4Prys8l0n


4. This isn't a GIF – the movement is all in your head.


5. This looks two photos of the same road, taken from different angles. But it’s just the same photo twice. https://t.co/pdq0iRynFw
Today's @bopinion post is about how poor countries started catching up to rich ones.

It looks like decolonization just took a few decades to start

Basic econ theory says poor countries should grow faster than rich ones.

But for much of the Industrial Revolution, the opposite happened.
https://t.co/JjjVtWzz5c

Why? Probably because the first countries to discover industrial technologies used them to conquer the others!

But then colonial empires went away. And yet still, for the next 30 years or so, poor countries fell further behind rich ones.
https://t.co/hilDvv0IQV

Why??

Possible reasons:
1. Bad institutions (dictators, communism, autarkic trade regimes)
2. Civil wars
3. Lack of education

But then, starting in the 80s (for China) and the 90s (for India and Indonesia), some of the biggest poor countries got their acts together and started to catch up!


Global inequality began to fall.