According to the sectoral shifts hypothesis:. a. frictional unemployment will cause workers to extend their temporary lay-offs.
b. most unemployed workers will return to their previous job because the firm knows the skills of the worker.
c. there will always be a pool of unemployed workers who experience spells of unemployment because they do not aggressively search for work cyclical unemployment will always exceed frictional unemployment.
d. there will be always be some level of unemployment because the skills of the workers do not match the skill requirements of employers.

Abenefit of using a debit or credit card instead of cash is that it provides a paper record of a purchase. looking at the purchases below, which one should be made using a credit or a debit card?

The distinction between a normal and an inferior good is

Reliability and validity reliability and validity are two important considerations that must be made with any type of data collection. reliability refers to the ability to consistently produce a given result. in the context of psychological research, this would mean that any instruments or tools used to collect data do so in consistent, reproducible ways. unfortunately, being consistent in measurement does not necessarily mean that you have measured something correctly. to illustrate this concept, consider a kitchen scale that would be used to measure the weight of cereal that you eat in the morning. if the scale is not properly calibrated, it may consistently under- or overestimate the amount of cereal that’s being measured. while the scale is highly reliable in producing consistent results (e.g., the same amount of cereal poured onto the scale produces the same reading each time), those results are incorrect. this is where validity comes into play. validity refers to the extent to which a given instrument or tool accurately measures what it’s supposed to measure. while any valid measure is by necessity reliable, the reverse is not necessarily true. researchers strive to use instruments that are both highly reliable and valid.