--- a/handouts/ho07.tex	Wed Nov 16 02:39:32 2016 +0000
+++ b/handouts/ho07.tex	Sun Dec 11 07:23:03 2016 +0000
@@ -86,6 +86,24 @@
 %data regarding your general usage of your computer, including which
 %programs you run and for how long.
 
+% Businesses are already using customised pricing online based on
+% information they can glean about you. It is hard to know how
+% widespread the practice is; companies keep their pricing strategies
+% closely guarded and are wary of the bad PR price discrimination
+% could pose. However, it is clear that a number of large retailers
+% are experimenting with it. Staples, for example, has offered
+% discounted prices based on whether rival stores are within 20 miles
+% of its customers’ location. Office Depot has admitted to using its
+% customers’ browsing history and location to vary its range of offers
+% and products. A 2014 study from Northeastern University found
+% evidence of “steering” or differential pricing at four out of 10
+% general merchandise websites and five out of five travel
+% websites. (Steering is when a company doesn’t give you a customised
+% price, but points you towards more expensive options if it thinks
+% you will pay more.) The online travel company Orbitz raised
+% headlines in 2012 when it emerged that the firm was pointing Mac
+% users towards higher-priced hotel rooms than PC users.
+
 \section*{Handout 6 (Privacy)}
 
 The first motor car was invented around 1886. For ten years,