Economics Answers

(True or False): In relational databases, the link between two tables is that the primary key of one table is the foreign key in the other table. Write a paragraph response on why it's true or false.

Question: In the fourth query, we use the WHERE and HAVING clauses. Please select the right choice for the relationship between these two clauses.

1. WHERE clause is used for filtering rows prior to the execution of aggregate functions, while the HAVING clause is used for filtering rows after the execution of aggregate functions.
2. WHERE clause is used for filtering rows after the execution of aggregate functions. The HAVING clause is used for filtering rows prior to the execution of aggregate functions.
3. The WHERE clause can be exchanged to use the HAVING clause.
4. The HAVING is not a clause in SQL queries.

(True or False): In relational databases, the link between two tables is that the primary key of one table is the foreign key in the other table. Write a paragraph response on why it's true or false.

Question: In the fourth query, we use the WHERE and HAVING clauses. Please select the right choice for the relationship between these two clauses.

1. WHERE clause is used for filtering rows prior to the execution of aggregate functions, while the HAVING clause is used for filtering rows after the execution of aggregate functions.
2. WHERE clause is used for filtering rows after the execution of aggregate functions. The HAVING clause is used for filtering rows prior to the execution of aggregate functions.
3. The WHERE clause can be exchanged to use the HAVING clause.
4. The HAVING is not a clause in SQL queries.

c) Clearly describe substitution effect and income effect for a fall in price for a normal good and an inferior good

The relational database is the technology basis of accounting information systems. Because the database management system can store and access data very fast and manage internal controls by assigning access control rights. The fast data availability makes many real-time AI applications achievable. You can see the root links between any data-related emerging technologies and relational databases. This chapter teaches you the primary working mechanism of relational databases. MS Access will be used to demonstrate hands-on practicing. Basic concepts in relational databases. What a database is and why it is important. The concepts of the data schema, primary key, and foreign key.

Question 1: The the primary key cannot be null in the relational database design. Please use one or two sentences to explain why?

Economic growth can bring benefits for society in that people, on average, have more income, but it also brings with it more problems. Just as economic theory at the microeconomic level can identify the externalities of economic consumption and production, so it can be used to highlight the trade-off between the benefits and costs of economic growth itself.

Explain both the meaning of economic growth and why it is considered to be an important objective for government. Apply relevant economic analysis to evaluate why it is argued that relying on economic growth itself is not a useful way of measuring real progress in advancing the well-being of society.

The World Health Organisation (WHO) global deaths as a result of road traffic accidents are 1.35 million per year with more than half of these being pedestrians, cyclists, and motorcyclists. In 2015 pollution from urban transport caused an average loss of 9 months of life expectancy and 482 000 premature deaths per year in the European Region. The economic cost of these health effects was valued at more than US$ 1.2 trillion per year.

1. Apply relevant economic theory to explain how, and analyze why, urban transport systems are failing to deliver efficient market outcomes.

2. Evaluate the range of policy options that could be used to ensure efficient and sustainable urban transport systems in the future.

Suppose that the average revenue of a short run perfectly competitive firm is 2 and its marginal and fixed costs are given as MC=3Q²-8Q+6 and TFC=10 then

A. Determine the level of profit at equilibrium and identify whether the firm makes positive profit ,normal profit or incure profit

B. What is the price level required for the firm to stay in the market ?