Location Quotients (LQ) are a simple tool used to determine the
spatial distribution (clustering/dispersal) of a phenomenon in a district, compared to an entire region
(used for spatial data, human geography, economics). The value of each Location Quotient is given by the formula above using the share (S) of the phenomenon observed, the sum of the shares, the total (T) phenonemon and the grand total (sum of T)
Location Quotients (LQ) are frequently used in demography, economics and any type of location analysis. The LQ is an index for comparing the importance of a phenomenon’s share with the general phenomenon over a certain area.
Location Quotients (LQ) are frequently used in demography, economics and any type of location analysis. The LQ is an index for comparing the importance of a phenomenon’s share with the general phenomenon over a certain area.
Example 1: repartition of grades of a candidate on the IB exam
Note: although we can apply the LQ to this example, the LQ is rather is used for spatial data, such as the Example 2 on the right. Here are the grades (S) awarded to John Doe on his IB exam, compared to the maximum grades possible (T) in each subject:
John got 6 in
Geography out of 29 pts = 20.7% of his total
Geography represents 7/45 of the max IB total = 15.6% LQ(Geography) = 20.7% / 15.6% = 1.33 John got 1 on EE/TOK out of 29 pts = 3.4% of his total EE/TOK represents 3/45 of the max IB total = 6.7% LQ(EE/TOK) = 3.4% / 6.7% = 0.52 We can use this formula to calculate the LQ for each subject:
Interpretation of LQ
results:

Example 2: spatial repartition of latino population in the Bay Area (note that figures given are
fictitious)
Here is the data (population) you have collected from the US Census:
200.000 Latinos in SF out of
3.250.000 in the Bay = 11.7% are in SF
San Francisco represents 700.000/6.000.000 of the pop = 6.2% of the pop LQ(San Francisco) = 6.2% / 11.7% = 0.53 2.220.000 Latinos in South Bay out of 3.250.000 in Bay = 67.7% are in SB South Bay represents 3.000.000/6.000.000 of the pop = 50.0% of the pop LQ(South Bay) = 67.7% / 50.0% = 1.35 We can use this formula to calculate the LQ for each region:
Interpretation of LQ
results:
