Figure: 20-1 -Based on the Social Media Identified in Figure 20-1,the Social

question 27

Multiple Choice

Figure: 20-1
-Based on the social media identified in Figure 20-1,the social media site rated highest in self-disclosure but lowest in media richness is

• A)Facebook.
• B)Tumblr.
• C)Wikipedia.
• D)Foursquare.

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Definitions:

Herfindahl Index

A measure of market concentration that squares and sums the market share percentages of all firms within an industry.

Four-Firm Concentration Ratio

The four-firm concentration ratio is a measure used to assess the competitiveness of a market by calculating the combined market share of the four largest firms within an industry.

Herfindahl Index

A measure of the size of firms in relation to the industry and an indicator of the competition level among them.

Dominant Strategy

In a strategic interaction (game) between two or more players, a course of action (strategy) that a player will wish to undertake no matter what the other players choose to do.