We show that certain winning bids for certain ebaY auctions obey Benford's Law. One implication of this is that it is unlikely that these bids are subjected to collusion among bidders, or 'shilling' on the part of sellers. Parenthetically, we also show that numbers from the naturally occurring...

We investigate some characteristics of the underground economy in New Zealand by testing for Granger causality between measured and 'hidden' real GDP in that country. We find clear evidence of causality from measured to hidden economic activity, but only weak evidence of causality in the reverse...

This paper considers the 'learning curve' relationship between the aggregate tax rate and the relative size of the hidden economy in New Zealand. Some simple non-linear models are estimated so that the effects of changes in the effective tax rate on the underground economy can be simulated. This...

This study investigates the quarterly relationship between the quantity of cigarettes sold, real disposable income per capita, and the relative price level of cigarettes in Canada. Careful attention is paid to the nonstationarity of the data and the dynamic specification of the model. It is...