How smart marketers can make the most of Census data

More detailed Census information is being released at the end of March. Critchlow's Tim Ryan shows you how to harness its power.

Though the primary purpose of the Census is to provide a population count and planning resource for government, in recent times the information collected has been used increasingly by market-focused organisations to enhance their marketing, customer insight and operations functions.

tim ryan how to use census data for marketing purposes targeting​The devastating Christchurch earthquakes delayed the 2011 Census until March 2013, adding another two years to the normal five-yearly Census cycle (the last was in 2006). Because of the longer-than-usual wait and popularity of the Census information, there is strong anticipation from marketers and data scientists for the release of the key 2013 Census information in March 2014. Interestingly, the cause of the delay—the earthquake—is one of the reasons for the clamour: what is the demography of the regenerating Christchurch?

Unless you’re one of the handful prosecuted for not completing your form, you’ll likely remember answering a large variety of questions. This information is aggregated to protect privacy, and the majority of it is released at various levels of geography: the lowest being census meshblock (neighbourhoods of roughly 50 households), which can be used as a building block for further regional and national aggregations. The information ranges from the standard demographic fare: the distribution of (and average) income, ages and ethnicities, to the types of house heating used, access to internet, type of occupation, residence at time of last Census, workplace address and even the prevalence of cigarette smoking.

All of this information is interesting, and you can get lost in it, but how can it be used effectively for your business?

One key area is optimising retail networks. By aligning store presence with concentrations of desired demographies, retailers can ensure they are best positioned to reach their target markets. And to understand how big the market in the catchment is, geomarketing-savvy organisations will often profile store catchments with a range of information sources, including Census data, to get a rich understanding of the local market. They will then target customers through any of the channels in the traditional marketing mix, such as unaddressed mail, or more surreptitiously through placing products that appeal to the catchment demography.

Market sizing can be done by matching another of Statistics New Zealand’s products, the Household Economic Survey (HES)—most recently completed to the end of June 2013—to the data. The HES reports the weekly spend across various expenditure categories for different demographics, such as that the most affluent households spend $50 a week on personal care, compared to $12 for the least affluent. Matching these to the meshblock Census data provides valuable metrics around market sizing and market share approximations.

Many organisations will match their customer databases to the meshblock-aggregated Census data as a way to predict customer attributes like income, presence of children or even whether they are likely to have access to mains gas. With these attributes attached to each customer, profiles can be generated, such as ‘what are the attributes of our best customers?’, or ‘which type of customer responded to our last campaign’? And the same principles apply for prospect data. 

Census is also used as an input into a range of products, such as geodemographic segmentations, where it is clustered with housing and information and profiled by syndicated market research to produce a descriptive household-level segmentation: such as affluent middle-aged professional couples living in homes with high capital values, or retirees enjoying life in coastal havens. Such applications highlight the synergistic value of combining typically disparate data sources through spatial joining.

Another example is combining the Census work and home address information then overlaying it with road network and drive time information. This not only allows demographic profiling of a workplace area, but, through the modelling of various transit routes, the transient profile of various locations. Both are valuable in targeting outdoor media and predicting demand for products and services. Did you know that if you took a random person from Remuera, Te Atatu, and Pukekohe, that person would have the same likelihood of working in Mt Wellington? This is despite Remuera being three and six times more convenient, respectively. 

The most recent releases from Statistics New Zealand show that the Christchurch City population has decreased by 11,000, while the surrounding adjacent Selwyn District has shown above-average growth. The key Census release in March will show exactly where the displaced Christchurch residents have gone. While, further north, we get quantification of Hamilton’s rapid growth in the northern suburbs.

Much of the basic Census information is released through Statistics NZ’s revamped website. It doesn’t take much to gain insight from the power of Census, though you can shorten the learning curve and supercharge the benefit by talking to data experts. Mark March 25 in your diaries.

Tim Ryan is Critchlow's geomarketing practice leader and has over 10 years' industry experience in customer and spatial analysis. Prior to this, he spent five years with Loyalty New Zealand as senior GIS consultant and senior insight manager. ​tim.ryan@critchlow.co.nz 

This post originally appeared on StopPress