A fan of classical music would like to attend the symphony multiple times in a given month, but her willingness to pay for each subsequent performance decreases with the number of performances she has already attended. In particular, she is willing to pay $150 for the first performance, $100 for the second, and $60 for the third. The cost of each ticket to the symphony amounts to roughly $40. Which of the two-part tariff schemes listed below yields the highest profit to the symphony from the given fan?

Suppose that the world price of steel is $100 a ton, india does not trade internationally, and the equilibrium price of steel in india is $60 a ton. suppose that india now begins to trade internationally. the price of steel in india the quantity of steel produced in india a. does not change; does not change b. falls; increases c. falls; decreases d. rises; decreases e. rises; increases the quantity of steel bought by india india steel. a. increases; exports b. decreases; imports c. decreases; exports d. does not change; neither imports nor exports e. increases; imports

Hours to produce one unit worker hours to produce yarn country a 8 hours country b 4 hours worker hours to produce fabric counrty a 12 hours country b 13 hours additional worker hours to produce fabric instead of yarn country a ? country b? which of the follow is true of the trade relationship between country a and country b? country a has an absolute advantage in producing yarn and fabric country b has an absolute advantage in producing yarn and fabric country b has a comparative advantage to country a in producing fabric country a has a comparative advantage to country b in producing fabric

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.