On Thursday's Backchat,  we're talking about the birth rate and the size of local families. The latest study by the Family Planning Association has found that a single-child household remains the most common family structure, which is consistent with the trend elsewhere in the developed world. And Hong Kong parents tend to have fewer children than they would like to have, citing the financial burden and extra responsibility of raising larger families. The survey also found that couples are having sex less often than they were when the last survey was carried out in 2012. Crowded living space was given as one of the main reasons. So what impact is all this likely to have on our personal well-being, and our ageing society? What effect will it have on the economy, and what about future immigration policy? Should we be striving to create a more family friendly environment?

After 9.20, we'll take a look at Shanghai, which has overtaken Hong Kong as the most expensive place in Asia to buy luxury goods and services.