La República y el fenómeno de la migración

v

”(l) No individual estimates or returns, and no information relating to an individual undertaking, obtained under the foregoing provisions of this Act, shall, without the previous consent in writing of the person carrying on the undertaking which is the subject of the estimates, returns or information, be disclosed, except -

(a) in accordance with directions given by the Minister

in charge of the Government department in possession

of the estimates, returns or information to a

Government department . . . for the purposes of the exercise by that department . . . of any of their functions; or

(b) for the purposes of any proceedings for an offence 222 under this Act or any report of those proceedings.” Having, therefore, received negative replies from the Department of Employment to the requests asking for the employment totals of

1959 and 1 9 6 8 disaggregated at the Employment Exchange Areas and/or

sub-regional levels for the 25 SIC and 152 MLH industrial

classifications, it became clear that the original aim of this research would have to be modified.

221 Extract from a letter received from the Statistics Division Cl of the Department of Employment in December 20 1976

222 Paragraph 1, Section 9> The Statistics of Trade Act 1947> London, HMSO, July 31st 1947*

II Alternative Research

A The Relationship between the Tress indices for the Standard

Regions disaggregated at the 25 SIC and the 152 MLH

industrial classifications for 1 9 5 9 and 1 9 6 8

1 Introduction

The restrictions imposed on the disclosure of information left a unique alternative with which to test the results of changes in the diversification or specialisation trends of employment structures in Great Britain using the Tress statistics. This alternative has been

to measure the Tress scores, both at the 25 SIC and the 1 5 2 MLH

industrial classifications for the ten economic planning regions of Great Britain, as well as for Great Britain as a whole for 1959 and'

1 9 6 8. Furthermore, Tress indices have also been calculated for

manufacturing industries and for all industries at both industrial

classifications (25 SIC and 152 MLH) for 1959 and 1 9 6 8.

The original aim of the research - to establish the most

appropriate level of geographical disaggregation as well as employment disaggregation for the analysis of the diversification and/or

specialisation tendencies of industrial structures in Great Britain - was altered and restricted to the measurement of Tress indices by different employment disaggregation (25 SIC and 152 MLH) only; the interest, therefore, was to measure these indices with the purpose of determining whether the level of industrial disaggregation does in fact influence the results obtained.

: : . o . o : . / o o c r c : . . .. .r cio.o ~ . o '' o o . . c . ' o c ' o c o G . o . ' ot o- c o o .. ' ■' c. oci c io ■ V ; . . c o o '■ - . ooc> - i.. Ci ’ ' , . : . . . ■ : . o . o o c . .0 o ; ci' o . / ' o _c o o t o o - .■ . .r o . o ' ■ C i - ' - ■ .■■■ ■■ ^ - - o . . - r j c .- • 0 o . ■O' o ;i ' . .. ( . ' ■ c. .c . 1 . o o _ . o o o oc c . o . .r . i j oo co o \ ' c . ' r' . . '..oC. \ o : oj ooc. o '. .t o. vi;.. o o

. _ - ' c. . r o .' . - : o i c . T O T . ci' o ' c t . . co ■ ■ . , : o . c o o o . ' t o o c. .. 0 0 . 0 . . . Ov. .. C) . . 0 . vo .. - o . T O ' . ‘ 0 . - 0 C . i C' . : C; 0 Ci C O 0 Ci C) , 0 , . u 0 0. i . ■ >. . ^ 0 . <j . L. , o c. o . ci . . c .. o oc.' o o . c' o :■ ci -c .. : o : c o o \ C r C ' o C c O' . •' : . o. O trv.ro

2 Calculation Procedures (a) Source of data

The employment totals (the estimated numbers of employees, employed and unemployed) at the end of May 1959 ty Standard Regions

were obtained in the Ministry of Labour Gazette issue of May i960.

The same figures for June 1968 were obtained in the Employment and

Productivity Gazette issue of March 1969. The Ministry of Labour

Gazette and the Employment and Productivity Gazette were both

publications of the Department of Employment. As from January 1971 the Department of Employment’s official publication has again changed name to Department of Employment Gazette.

(b) Geographical delimitations

The regional divisions for the employment totals in 1959 are the old Standard Regions: London and South-East, East and South, South West, Midlands, North Midlands, East and West Ridings, Northwest, North,

Scotland and Wales.

For 1968, the regional division of Great Britain is based on the

new Standard Regions: South East, East Anglia, South West, East Midlands West Midlands, Yorkshire and Humberside, Northwest, North, Scotland and Wales.

225

According to Dixon and Thirl wall, however, the new Standard

Regions of the South East, East Anglia, East Midlands, West Midlands and Yorkshire and Humberside are broadly equivalent in area to the old Standard Regions of London and South East, East and West, North Midlands Midlands and East and West Ridings, respectively. The boundaries of

the other regions have remained virtually unchanged over time.

c Calculation of the Tress statistic indices 224

In Chapter 3, a brief explanation was given of the procedures

for the calculation of the Tress index statistic.

Taking the region of Yorkshire and Humberside as an example, a step-by-step demonstration will be given for the calculation of the Tress indices for the manufacturing industries as well as for all industries for 1968 disaggregated at the 25 SIC industrial

225