young_rutabaga

My favorite one is a "Share the Road" sign with a bike on it, intended to remind drivers of bikers' presence -- but placed in the middle of a bike lane. Palo Alto loves these for some reason

Snipers essentially convert the ascending-bid proxy auction used in eBay into a Vickrey second-price sealed bid auction, allowing a buyer to not reveal their preferences to other participants. In theory, with rational participants, this shouldn't have any effect on revenue. In practice, buyers do not always understand auction mechanics and delay setting the highest price they're willing to pay until they are outbid. If they're outbid 3 seconds before the deadline, they lost.

It's worth checking if room temperature is measured at the thermostat or at the return. It's a common issue with ducted Mitsubishi systems.

Also, a thermostat should be away from the air flow from supply registers to measure representative temperature

Inverter heat pumps shouldn't be controlled by dumb "smart" thermostats like Nest. They send only on-off signals, while a compatible communicating thermostat sends a numerical setpoint, allowing the unit to modulate

High turnover, high costs. You flip your position too often

This paper is a hilarious dump of WQ's randomly generated formulas that (hopefully) happen to pass in-sample test.

  Alpha#33: rank((-1 * ((1 - (open / close))^1)))

This formula trivially reduces to

  rank(open/close - 1)

which is an example of a mean-reversion strategy. But: 1) nobody bothered to simplify this formula, 2) as any mean reversion, it is extremely difficult to trade.