Stata Tip 32: Do not Stop

Do Not Copy Do Not Copy Do Not Copy Do Not Copy Do Not Copy Do Not Copy Do Not Copy Do Not Copy Do Not Copy

Design a clocked synchronous state machine with four inputs, G1–G4, that are connected to pushbuttons. The machine has four outputs, L1–L4, connected to lamps or LEDs located near the like-numbered pushbuttons. There is also an ERR output connected to a red lamp. In normal operation, the L1–L4 outputs display a 1-out-of-4 pattern. At each clock tick, the pattern is rotated by one position; the ...

M 32 - like galaxies : still very rare M 32 analogues do not exist in the Leo group

New observations of galaxies in the direction of the Leo group, which were classified as being candidates for M 32-like dwarf galaxies by Ferguson & Sandage (1990), show that these galaxies are normal elliptical galaxies at redshifts between z = 0.02 and z = 0.06. This result adds further evidence that the faint end of the luminosity function of elliptical galaxies falls off very steeply and th...

Do We Know What We Do not Know? A Response to Celine Bonnet

Why Do We Tip Taxicab Drivers?

The leading economic explanation for tipping –that is, explanation why the practice is socially beneficial, not why individuals leave tips even though it is not narrowly advantageous to them– is that it confers an incentive to provide personal services. This fits many instances in which tipping is common but does not fit the taxicab business very well. We propose two novel explanations of tippi...

When Do Markets Tip? An Experimental Study

We report the results of laboratory experiments examining platform competition in two-sided markets. Owing to “market size” e¤ects that favor the platform with the larger customer base, there always exist equilibria in which all participants “tip” to one platform or the other. When “market impact” e¤ects are su¢ ciently large, then there also exist interior equilibria where both platforms enjoy...