Of either of the two goods is constant.
It is the psychologist.
Ophthalmologist is a doctor for your eyes.
Glib is apparently a adjective.
Chauvinist is intense patriotism.(if you want more info, google is your friend)
Households dissave when en their consumption exceeds their incomes. The extra money comes from two sources: credit and past incomes, also known as savings. When a house dissaves it can either borrow money from financial institutions or spend money that was previously saved. Everyone cannot dissave at the same time because banks would not have enough money to fund everybody's excessive consumption.
In this example, john's whistling is serving as a discriminative stimulus.
This procedure, studied by Ivan Pavlov, shows a stimulus ( in this case the action of John's whistling) and a response ( the cattle run to the food trough).
Pavlov studied it with dogs. He realised that when a trainer fed them, dogs salivated. So, he presented the dogs with a "stimulus" ( the sound of a metronome) and when he gave the dogs food. After a few repetitions, when the dog listened to the stimulus, it salivated.
