I’d say this little piece by Paul Krugman, and the associated note, will end up on lots of undergraduate syllabi. Liquidity traps are boring to teach, until you find yourself in the middle of one. From an Irish point of view, however, the key section is the following:
if some subset of the work force accepts lower wages, it can gain jobs. If workers in the widget industry take a pay cut, this will lead to lower prices of widgets relative to other things, so people will buy more widgets, hence more employment.
The point is that the Irish are just a subset of the Eurozone workforce, and that our GDP is the equivalent of Krugman’s widgets, whose relative price can be reduced. Krugman makes the same point in a follow-up post here. Of course, devaluation would be preferable to wage (and price) cuts: it would avoid the debt deflation and rising real interest rates which Krugman talks about. But it is not an option.