| Houston | Lisbon | |
| Water bottle (1.5 liter) | USD 1.71 | USD 0.67 |
| Imported beer at restaurant | USD 4.50 | USD 2.71 |
| Apartment (3 bedrooms) in city centre | USD 2 686.36 | USD 1 252.53 |
| Cinema, international release, 1 seat | USD 12.00 | USD 8.14 |
| Gasoline (1 liter) | USD 0.90 | USD 2.21 |