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Reading the data
Good data display is not decoration; it is an argument you can check with your own eyes.
If I knew then.
A few notes from further up the trail: things we have learned, often the hard way, written down for the kids before we forget them, and for anyone a few steps behind. Take what is useful. Reflections, a few essays, the occasional story; some are public, the rest stay private.
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A number you can move with your own hands teaches more than a number you only read.
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The numbers and the experience of living through them are almost never the same story.
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What you measure is what you optimize, so be careful you are measuring the thing you actually want.
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A country gets one demographic window, and Vietnam is standing in the middle of its own right now.
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Most decisions do not need certainty, they need a cheap way to be wrong.