By 1839 a large proportion of the Māori trade in goods was paid for in cash, with Māori showing a strong preference for coins rather than paper banknotes. Northern Māori learnt that they could more easily hide cash from their relatives avoiding the traditional obligatory sharing of goods with their . The period 1835 to 1840 completed the revolution in the north Māori economy with Māori abandoning many of their former trading habits and adopting those of the Europeans to the point where Māori became dependent on the flow of European goods to maintain their new way of life.