the Dutch had improved on the Italian system of public debt (introducing, among other things, lottery loans which allowed people to gamble as they invested their savings in government debt). They had also reformed their currency by creating what was arguably the world's first central bank, the Amsterdam Exchange Bank (Wisselbank), which solved the problem of debased coinage by creating a reliable form of bank money (see Chapter 1). But perhaps the single greatest Dutch invention of all was the joint-stock company.