By The Editors Chinese families — aware of the dangers posed by baby formula contaminated with melamine and other harmful substances — prefer to buy brands produced and sold in other countries.  That is, if they can afford it.  Many can. The increasing demand from Chinese families has resulted in the current global shortages and subsequent imposed limits on purchases.  In January, the New Zealand Food Safety Authority started to investigate the online trade in China of Kiwi-made baby formula.  At about the same time, Woolworths – a chain of Australian supermarkets – limited sales of all baby formula to four tins per transaction.  And, in February, the Hong Kong’s government set limits…