key.sector: Impact Analysis via Backward and Forward Linkages

In ioanalysis: Input Output Analysis

Description

Uses backward and forward linkages to identify key sectors in the system. Can calculate total and direct linkages. If the data is multiregional, intraregional and interregional linkages can be calculated. Can also be used on a specified subset of all regions.

Usage

key.sector(io, ES = NULL, crit = 1, regions = "all", sectors = "all", 
           type = c("direct"), intra.inter = FALSE)

Arguments

io	An object of class InputOutput calculated from as.inputoutput.
ES	An object of class EasySelect from easy.select
crit	Integer. The value to compare linkages above or below to classify sectors. Default is 1.
regions	Character or Integer. Specific regions to be used. Can either be a character that exactly matches the name of the region in RS_label or the number of the region in the order it appears in RS_label.
sectors	Character or Integer. Specific sectors to be used. Can either be a character that exactly matches the name of the sector in RS_label or the number of the sector in the order it RS_label.
type	Character. Identifying the type of backward and forward linkages to be calculated. Options are "total" and "direct".
intra.inter	Logical. Only applies to multiregional systems. Determines whether or not to calculate intraregional and interregional backward and forward linkages in addition to aggregate linkages.

Details

Uses the (various) specified backward and forward linkages to calculate a key to identify dependence using the specified critical value.

I BL < crit, FL < crit - Generally independent

II BL < crit, FL > crit - Dependent on interindustry demand

III BL > crit, FL > crit - Generally dependent

IV BL > crit, FL < crit - Dependent on interindustry supply

Value

If there is only one region, key sector binds to the output from linkages to make a table. Otherwise, it produces a list of key sector codes for each country using the names of regions provided. See Examples for more details.

Author(s)

John J. P. Wade, Ignacio Sarmiento-Barbieri

References

Blair, P.D. and Miller, R.E. (2009). "Input-Output Analysis: Foundations and Extensions". Cambridge University Press

Nazara, Suahasil & Guo, Dong & Hewings, Geoffrey J.D., & Dridi, Chokri, 2003. "PyIO. Input-Output Analysis with Python". REAL Discussion Paper 03-t-23. University of Illinois at Urbana-Champaign. (http://www.real.illinois.edu/d-paper/03/03-t-23.pdf)

See Also

linkages, as.inputoutput

Examples

data(toy.IO)
class(toy.IO)
key1 <- key.sector(toy.IO)
key1$Narnia

# A more detailed example
# Using critical value of 2 because this is randomly generated data and better 
# illustrates functionality
key2 <- key.sector(toy.IO, intra.inter = TRUE, type = c("direct"), crit = 2)
key2

key3 <- key.sector(toy.IO, regions = c(1:2), sectors = c(1:3,5))
key3

Example output

Loading required package: ggplot2
Loading required package: plot3D
Loading required package: lpSolve
Warning message:
no DISPLAY variable so Tk is not available 
[1] "InputOutput"
               BL.dir    FL.dir key.dir
Pizza       0.3175995 0.4052596       I
Wii         0.3171828 0.2832168       I
Spaceships  0.3835307 0.3553299       I
Lightsabers 0.2646111 0.2153705       I
Minions     0.2606965 0.3402985       I
$Hogwarts
            BL.intra.dir FL.intra.dir key.intra.dir BL.inter.dir FL.inter.dir
Pizza         0.12639594    0.1071066             I    0.1690355    0.1380711
Wii           0.07594937    0.1429635             I    0.1846612    0.2099777
Spaceships    0.11144398    0.1348113             I    0.1354104    0.1731576
Lightsabers   0.18477044    0.1898096             I    0.1965286    0.1013438
Minions       0.26217765    0.1905444             I    0.1554441    0.2048711
            key.inter.dir BL.agg.dir FL.agg.dir key.agg.dir
Pizza                   I  0.2954315  0.2451777           I
Wii                     I  0.2606106  0.3529412           I
Spaceships              I  0.2468544  0.3079688           I
Lightsabers             I  0.3812990  0.2911534           I
Minions                 I  0.4176218  0.3954155           I

$Narnia
            BL.intra.dir FL.intra.dir key.intra.dir BL.inter.dir FL.inter.dir
Pizza          0.1834120    0.2346595             I    0.1341875   0.17060013
Wii            0.1638362    0.1883117             I    0.1533467   0.09490509
Spaceships     0.2081218    0.1466441             I    0.1754089   0.20868584
Lightsabers    0.1352968    0.1178095             I    0.1293143   0.09756098
Minions        0.1552239    0.1661692             I    0.1054726   0.17412935
            key.inter.dir BL.agg.dir FL.agg.dir key.agg.dir
Pizza                   I  0.3175995  0.4052596           I
Wii                     I  0.3171828  0.2832168           I
Spaceships              I  0.3835307  0.3553299           I
Lightsabers             I  0.2646111  0.2153705           I
Minions                 I  0.2606965  0.3402985           I

$Hogwarts
              BL.dir    FL.dir key.dir
Pizza      0.2954315 0.2451777       I
Wii        0.2606106 0.3529412       I
Spaceships 0.2468544 0.3079688       I
Minions    0.4176218 0.3954155       I

$Narnia
              BL.dir    FL.dir key.dir
Pizza      0.3175995 0.4052596       I
Wii        0.3171828 0.2832168       I
Spaceships 0.3835307 0.3553299       I
Minions    0.2606965 0.3402985       I

ioanalysis documentation built on Jan. 13, 2021, 5:16 p.m.